Structural Bolts

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Structural bolts are heavy hex bolts constructed of medium carbon steel. They have a flat bearing surface, washer face and chamfered point. They are commonly used in heavy-duty structural steel joints.

GRAINGER -

7/8"-9 Coarse Black Oxide Grade A490 Type 1 Structural Bolts

StyleModelGrip SizeMaterialThread StyleHead HeightTypeThread DirectionHardnessTensile StrengthPrice (inc. VAT)
AU04008.087.03001 1/2"SteelPartially Threaded35/64"Structural BoltRight HandRockwell C25120000 psi£44.18
BU04008.087.02751 1/4"SteelPartially Threaded35/64"Structural BoltRight HandRockwell C25120000 psi£41.93
AU04008.087.03251 3/4"SteelPartially Threaded35/64"Structural BoltRight HandRockwell C25120000 psi£43.73
BU04008.087.02501"SteelPartially Threaded35/64"Structural BoltRight HandRockwell C25120000 psi£39.14
BU04008.087.02001/2"SteelPartially Threaded35/64"Structural BoltRight HandRockwell C25120000 psi£36.60
CU04008.087.04002 1/2"SteelPartially Threaded35/64"Structural BoltRight HandRockwell C25120000 psi£54.40
CU04008.087.03752 1/4"SteelPartially Threaded35/64"Structural BoltRight HandRockwell C25120000 psi£53.99
CU04008.087.04252 3/4"SteelPartially Threaded35/64"Structural BoltRight HandRockwell C25120000 psi£59.99
CU04008.087.03502"SteelPartially Threaded35/64"Structural BoltRight HandRockwell C25120000 psi£49.42
DU04008.087.05003 1/2"SteelPartially Threaded35/64"Structural BoltRight HandRockwell C25120000 psi£75.16
DU04008.087.04753 1/4"SteelPartially Threaded35/64"Structural BoltRight HandRockwell C25120000 psi£65.36
CU04008.087.04503"SteelPartially Threaded35/64"Structural BoltRight HandRockwell C25120000 psi£71.32
BU04008.087.02253/4"SteelPartially Threaded35/64"Structural BoltRight HandRockwell C25120000 psi£38.18
EU04008.087.06004 1/2"SteelPartially Threaded35/64"Structural BoltRight HandRockwell C25120000 psi£82.31
DU04008.087.05504"SteelPartially Threaded35/64"Structural BoltRight HandRockwell C25120000 psi£71.77
EU04008.087.07005 1/2"SteelPartially Threaded35/64"Structural BoltRight HandRockwell C25120000 psi£99.94
EU04008.087.06505"SteelPartially Threaded35/64"Structural BoltRight HandRockwell C25120000 psi£91.75
FU04008.087.08006 1/2"SteelPartially Threaded35/64"Structural BoltRight HandRockwell C25120000 psi£115.93
DISCO -

Hex Structural Bolt

StyleModelHead HeightTypeHead Dia.Head WidthDrive SizeWasher Outside Dia.MaterialThread StylePrice (inc. VAT)Pkg. Qty.
A10097PK4 mmBody Bolt10 mm10 mm10 mm18.5 mmSteelFully Threaded£41.2850
B9064PK4.7 mmCA Body9.5 mm15 mm15 mm28 mmSteelFully Threaded£28.511
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5/8"-11 Coarse Black Oxide Grade A325 Type 1 Structural Bolts

StyleModelThread StyleTypeGrip SizeMaterialHead HeightThread DirectionHardnessTensile StrengthPrice (inc. VAT)Pkg. Qty.
AU04006.062.0125Fully ThreadedStructural Bolt With Nut-Steel25/64"Right HandRockwell C25120000 psi£38.1610
BU04006.062.0150Partially ThreadedStructural Bolt With Nut1/4"Steel25/64"Right HandRockwell C25120000 psi£17.781
CU04005.062.0200Partially ThreadedStructural Bolt3/4"Steel25/64"Right HandRockwell C25120000 psi£30.741
DU04006.062.0375Partially ThreadedStructural Bolt With Nut2 1/2"Steel25/64"Right HandRockwell C25120000 psi£22.251
EU04005.062.0325Partially ThreadedStructural Bolt2"Steel25/64"Right HandRockwell C25120000 psi£42.371
FU04005.062.0400Partially ThreadedStructural Bolt2 3/4"Steel25/64"Right HandRockwell C25120000 psi£64.871
GU04006.062.0500Partially ThreadedStructural Bolt With Nut3 3/4"Steel25/64"Right HandRockwell C25120000 psi£29.141
GU04006.062.0450Partially ThreadedStructural Bolt With Nut3 1/4"Steel25/64"Right HandRockwell C25120000 psi£23.341
BU04006.062.0175Partially ThreadedStructural Bolt With Nut1/2"Steel25/64"Right HandRockwell C25120000 psi£21.371
BU04006.062.0200Partially ThreadedStructural Bolt With Nut3/4"Steel25/64"Right HandRockwell C25120000 psi£22.751
GU04006.062.0550Partially ThreadedStructural Bolt With Nut4 1/4"Steel25/64"Right HandRockwell C25120000 psi£22.801
GU04006.062.0600Partially ThreadedStructural Bolt With Nut4 3/4"Steel25/64"Right HandRockwell C25120000 psi£25.911
HU04006.062.0250Partially ThreadedStructural Bolt With Nut1 1/4"Steel25/64"Right HandRockwell C25120000 psi£52.9810
IU04005.062.0500Partially ThreadedStructural Bolt3 3/4"Steel25/64"Right HandRockwell C25120000 psi£60.431
JU04005.062.0450Partially ThreadedStructural Bolt3 1/4"Steel25/64"Right HandRockwell C25120000 psi£46.181
KU04005.062.0300Partially ThreadedStructural Bolt1 3/4"Steel25/64"Right HandRockwell C25120000 psi£39.0410
LU04006.062.0275Partially ThreadedStructural Bolt With Nut1 1/2"Steel25/64"Right HandRockwell C25120000 psi£18.701
DU04006.062.0325Partially ThreadedStructural Bolt With Nut2"Steel25/64"Right HandRockwell C25120000 psi£21.321
EU04005.062.0350Partially ThreadedStructural Bolt2 1/4"Steel25/64"Right HandRockwell C25120000 psi£48.191
DU04006.062.0350Partially ThreadedStructural Bolt With Nut2 1/4"Steel25/64"Right HandRockwell C25120000 psi£36.231
MU04005.062.0600Partially ThreadedStructural Bolt4 3/4"Steel25/64"Right HandRockwell C25120000 psi£59.451
NU04005.062.0250Partially ThreadedStructural Bolt1 1/4"Steel25/64"Right HandRockwell C25120000 psi£39.181
OU04005.062.0175Partially ThreadedStructural Bolt1/2"Steel25/64"Right HandRockwell C25120000 psi£36.161
LU04006.062.0300Partially ThreadedStructural Bolt With Nut1 3/4"Steel25/64"Right HandRockwell C25120000 psi£56.8910
MU04005.062.0550Partially ThreadedStructural Bolt4 1/4"Steel25/64"Right HandRockwell C25120000 psi£69.901
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3/4"-10 Coarse Hot Dipped Galvanized Grade A325 Type 1 Structural Bolts

StyleModelTypeGrip SizeMaterialThread StyleHead HeightThread DirectionHardnessTensile StrengthPrice (inc. VAT)Pkg. Qty.
AU04210.075.0150Structural Bolt1/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£60.351
BU04210.075.0650Structural Bolt5 1/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£122.561
BU04210.075.0750Structural Bolt6 1/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£140.341
CU04210.075.0550Structural Bolt4 1/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£32.421
DU04210.075.0375Structural Bolt2 3/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£96.601
EU04210.075.0500Structural Bolt3 5/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£70.401
CU04210.075.0525Structural Bolt3 7/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£81.501
FU04210.075.0425Structural Bolt2 7/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£68.5010
GU04210.075.0200Structural Bolt5/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£65.171
EU04210.075.0450Structural Bolt3 1/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£33.961
EU04210.075.0475Structural Bolt3 3/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£70.661
HU04210.075.0175Structural Bolt3/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£34.8510
IU04210.075.0600Structural Bolt4 5/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£130.821
BU04210.075.0700Structural Bolt5 5/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£126.891
JU04210.075.0800Structural Bolt6 5/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£147.071
KU04210.075.0350Structural Bolt2 1/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£94.691
LU04210.075.0300Structural Bolt1 5/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£84.051
MU04210.075.0250Structural Bolt1 1/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£75.131
NU04210.075.0275Structural Bolt1 3/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£79.641
OU04210.075.0400Structural Bolt2 5/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£100.551
PU04210.075.0225Structural Bolt7/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£69.121
QU04210.075.0325Structural Bolt1 7/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£87.861
RU04211.075.0525Structural Bolt With Nut3 7/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£22.451
SU04211.075.0800Structural Bolt With Nut6 5/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£96.781
RU04211.075.0550Structural Bolt With Nut4 1/8"SteelPartially Threaded15/32"Right HandRockwell C25120000 psi£38.711
GRAINGER -

M16 x 2 Coarse Black Oxide Class 10.9 Structural Bolts

StyleModelGrip SizeMaterialThread StyleHead HeightTypeThread DirectionHardnessTensile StrengthPrice (inc. VAT)
AM04005.160.005022 mmSteelPartially Threaded10 mmStructural BoltRight HandRockwell C32-C39145038 psi£367.73
BM04005.160.005527 mmSteelPartially Threaded10 mmStructural BoltRight HandRockwell C32-C39145038 psi£539.54
CM04005.160.006032 mmSteelPartially Threaded10 mmStructural BoltRight HandRockwell C32-C39145038 psi£362.59
DM04005.160.006537 mmSteelPartially Threaded10 mmStructural BoltRight HandRockwell C32-C39145038 psi£418.02
DM04005.160.007042 mmSteelPartially Threaded10 mmStructural BoltRight HandRockwell C32-C39145038 psi£290.30
EM04005.160.007547 mmSteelPartially Threaded10 mmStructural BoltRight HandRockwell C32-C39145038 psi£541.64
FM04005.160.008052 mmSteelPartially Threaded10 mmStructural BoltRight HandRockwell C32-C39145038 psi£277.74
GM04005.160.010072 mmSteelPartially Threaded10 mmStructural BoltRight HandRockwell C32-C39145038 psi£131.39
GM04005.160.011082 mmSteelPartially Threaded10 mmStructural BoltRight HandRockwell C32-C39145038 psi£232.79
GRAINGER -

M20 x 2.5 Coarse Black Oxide Class 10.9 Structural Bolts

StyleModelGrip SizeMaterialThread StyleHead HeightTypeThread DirectionHardnessTensile StrengthPrice (inc. VAT)Pkg. Qty.
AM04005.200.005017 mmSteelPartially Threaded13 mmStructural BoltRight HandRockwell C32-C39145038 psi£364.8025
BM04005.200.005522 mmSteelPartially Threaded13 mmStructural BoltRight HandRockwell C32-C39145038 psi£202.301
BM04005.200.006027 mmSteelPartially Threaded13 mmStructural BoltRight HandRockwell C32-C39145038 psi£479.581
CM04005.200.007037 mmSteelPartially Threaded13 mmStructural BoltRight HandRockwell C32-C39145038 psi£400.301
DM04005.200.007542 mmSteelPartially Threaded13 mmStructural BoltRight HandRockwell C32-C39145038 psi£425.291
EM04005.200.008047 mmSteelPartially Threaded13 mmStructural BoltRight HandRockwell C32-C39145038 psi£393.141
EM04005.200.008552 mmSteelPartially Threaded13 mmStructural BoltRight HandRockwell C32-C39145038 psi£410.361
EM04005.200.009057 mmSteelPartially Threaded13 mmStructural BoltRight HandRockwell C32-C39145038 psi£462.961
FM04005.200.010067 mmSteelPartially Threaded13 mmStructural BoltRight HandRockwell C32-C39145038 psi£511.921
FM04005.200.011077 mmSteelPartially Threaded13 mmStructural BoltRight HandRockwell C32-C39145038 psi£530.771
FM04005.200.012087 mmSteelPartially Threaded13 mmStructural BoltRight HandRockwell C32-C39145038 psi£398.511
FM04005.200.013097 mmSteelPartially Threaded13 mmStructural BoltRight HandRockwell C32-C39145038 psi£551.031
FM04005.200.0140107 mmSteelPartially Threaded13 mmStructural BoltRight HandRockwell C32-C39145038 psi£605.481
DISCO -

M6 x 1 Coarse Phosphate Structural Bolts

StyleModelWasher Outside Dia.MaterialThread StyleHead HeightTypeHead Dia.Head WidthDrive TypePrice (inc. VAT)Pkg. Qty.
A5684PK17 mmSteelFully Threaded4.7 mmCA Body9.5 mm10 mmExternal Hex£29.881
B5692PK17 mmSteelFully Threaded4.7 mmCA Body9.5 mm10 mmExternal Hex£33.7950
C5690PK24 mmSteelFully Threaded4.7 mmCA Body9.5 mm10 mmExternal Hex£26.8350
StyleModelThread StyleMaterialHead HeightTypeThread DirectionHardnessTensile StrengthThread FitPrice (inc. VAT)Pkg. Qty.
AU08440.075.0150Fully ThreadedSteel1/2"Tower BoltRight HandRockwell B8074000 psiClass 2A£30.181
AU08440.075.0225Fully ThreadedSteel1/2"Tower BoltRight HandRockwell B8074000 psiClass 2A£30.771
AU08440.075.0200Fully ThreadedSteel1/2"Tower BoltRight HandRockwell B8074000 psiClass 2A£30.9510
AU08440.075.0250Partially ThreadedSteel1/2"Tower BoltRight HandRockwell B8074000 psiClass 2A£33.411
APPROVED VENDOR -

1/2"-13 Coarse Black Oxide Grade A325 Type 1 Structural Bolts

StyleModelThread StyleTypeGrip SizeMaterialHead HeightThread DirectionHardnessTensile StrengthPrice (inc. VAT)Pkg. Qty.
AU04006.050.0125Fully ThreadedStructural Bolt With Nut-Steel5/16"Right HandRockwell C25120000 psi£23.141
BU04006.050.0225Partially ThreadedStructural Bolt With Nut1 1/4"Steel5/16"Right HandRockwell C25120000 psi£114.4625
CU04005.050.0375Partially ThreadedStructural Bolt2 3/4"Steel5/16"Right HandRockwell C25120000 psi£51.471
DU04005.050.0275Partially ThreadedStructural Bolt1 3/4"Steel5/16"Right HandRockwell C25120000 psi£75.7425
EU04005.050.0150Partially ThreadedStructural Bolt1/2"Steel5/16"Right HandRockwell C25120000 psi£39.531
FU04006.050.0325Partially ThreadedStructural Bolt With Nut2 1/4"Steel5/16"Right HandRockwell C25120000 psi£28.281
GU04005.050.0200Partially ThreadedStructural Bolt1"Steel5/16"Right HandRockwell C25120000 psi£52.391
HU04006.050.0150Partially ThreadedStructural Bolt With Nut1/2"Steel5/16"Right HandRockwell C25120000 psi£131.861
FU04006.050.0375Partially ThreadedStructural Bolt With Nut2 3/4"Steel5/16"Right HandRockwell C25120000 psi£30.701
IU04005.050.0225Partially ThreadedStructural Bolt1 1/4"Steel5/16"Right HandRockwell C25120000 psi£54.971
FU04006.050.0275Partially ThreadedStructural Bolt With Nut1 3/4"Steel5/16"Right HandRockwell C25120000 psi£36.431
JU04005.050.0125Partially ThreadedStructural Bolt1/4"Steel5/16"Right HandRockwell C25120000 psi£24.841
FU04006.050.0350Partially ThreadedStructural Bolt With Nut2 1/2"Steel5/16"Right HandRockwell C25120000 psi£27.921
BU04006.050.0175Partially ThreadedStructural Bolt With Nut3/4"Steel5/16"Right HandRockwell C25120000 psi£83.561
BU04006.050.0200Partially ThreadedStructural Bolt With Nut1"Steel5/16"Right HandRockwell C25120000 psi£139.661
CU04005.050.0325Partially ThreadedStructural Bolt2 1/4"Steel5/16"Right HandRockwell C25120000 psi£51.7225
CU04005.050.0350Partially ThreadedStructural Bolt2 1/2"Steel5/16"Right HandRockwell C25120000 psi£54.841
BU04006.050.0250Partially ThreadedStructural Bolt With Nut1 1/2"Steel5/16"Right HandRockwell C25120000 psi£35.531
FU04006.050.0400Partially ThreadedStructural Bolt With Nut3"Steel5/16"Right HandRockwell C25120000 psi£41.211
KU04005.050.0250Partially ThreadedStructural Bolt1 1/2"Steel5/16"Right HandRockwell C25120000 psi£43.6725
FU04006.050.0300Partially ThreadedStructural Bolt With Nut2"Steel5/16"Right HandRockwell C25120000 psi£96.2325
LU04005.050.0300Partially ThreadedStructural Bolt2"Steel5/16"Right HandRockwell C25120000 psi£80.461
GU04005.050.0175Partially ThreadedStructural Bolt3/4"Steel5/16"Right HandRockwell C25120000 psi£31.791
CU04005.050.0400Partially ThreadedStructural Bolt3"Steel5/16"Right HandRockwell C25120000 psi£52.9625
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1"-8 Coarse Black Oxide Grade A325 Type 1 Structural Bolts

StyleModelTypeGrip SizeMaterialThread StyleHead HeightThread DirectionHardnessTensile StrengthPrice (inc. VAT)Pkg. Qty.
AU04005.100.0400Structural Bolt2 1/4"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£71.401
BU04005.100.0500Structural Bolt3 1/4"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£16.615
CU04005.100.0550Structural Bolt3 3/4"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£97.361
DU04005.100.0700Structural Bolt5 1/4"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£95.631
BU04005.100.0450Structural Bolt2 3/4"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£87.121
EU04005.100.0325Structural Bolt1 1/2"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£68.051
FU04005.100.0600Structural Bolt4 1/4"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£100.791
GU04005.100.0650Structural Bolt4 3/4"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£111.541
HU04005.100.0300Structural Bolt1 1/4"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£70.381
IU04005.100.0350Structural Bolt1 3/4"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£65.441
JU04005.100.0225Structural Bolt1/2"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£58.371
HU04005.100.0250Structural Bolt3/4"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£60.961
KU04005.100.0200Structural Bolt1/4"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£48.481
HU04005.100.0275Structural Bolt1"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£42.621
LU04005.100.0425Structural Bolt2 1/2"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£83.921
MU04005.100.0800Structural Bolt6 1/4"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£138.601
DU04005.100.0750Structural Bolt5 3/4"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£130.551
NU04005.100.0375Structural Bolt2"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£75.601
OU04006.100.0225Structural Bolt With Nut1/2"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£21.801
PU04006.100.0500Structural Bolt With Nut3 1/4"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£56.591
PU04006.100.0450Structural Bolt With Nut2 3/4"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£51.411
OU04006.100.0200Structural Bolt With Nut1/4"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£27.961
QU04006.100.0700Structural Bolt With Nut5 1/4"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£43.155
PU04006.100.0550Structural Bolt With Nut3 3/4"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£33.941
QU04006.100.0650Structural Bolt With Nut4 3/4"SteelPartially Threaded39/64"Right HandRockwell C25120000 psi£51.081
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1 1/8"-7 Coarse Hot Dipped Galvanized Grade A325 Type 1 Structural Bolts

StyleModelTypeHardnessGrip SizeMaterialThread StyleHead HeightThread DirectionTensile StrengthPrice (inc. VAT)
AU04210.112.1000Structural BoltRockwell C198"SteelPartially Threaded11/16"Right Hand120000 psi£165.76
BU04210.112.0650Structural BoltRockwell C194 1/2"SteelPartially Threaded11/16"Right Hand120000 psi£116.23
CU04210.112.0500Structural BoltRockwell C193"SteelPartially Threaded11/16"Right Hand120000 psi£92.88
DU04210.112.0425Structural BoltRockwell C192 1/4"SteelPartially Threaded11/16"Right Hand120000 psi£93.16
AU04210.112.0900Structural BoltRockwell C257"SteelPartially Threaded11/16"Right Hand120000 psi£148.08
EU04210.112.0550Structural BoltRockwell C193 1/2"SteelPartially Threaded11/16"Right Hand120000 psi£100.02
FU04210.112.0700Structural BoltRockwell C195"SteelPartially Threaded11/16"Right Hand120000 psi£93.31
GU04210.112.0325Structural BoltRockwell C191 1/4"SteelPartially Threaded11/16"Right Hand120000 psi£77.30
HU04210.112.0800Structural BoltRockwell C196"SteelPartially Threaded11/16"Right Hand120000 psi£137.20
IU04210.112.0600Structural BoltRockwell C194"SteelPartially Threaded11/16"Right Hand120000 psi£67.98
JU04210.112.0300Structural BoltRockwell C191"SteelPartially Threaded11/16"Right Hand120000 psi£48.44
DU04210.112.0450Structural BoltRockwell C192 1/2"SteelPartially Threaded11/16"Right Hand120000 psi£100.12
KU04210.112.0350Structural BoltRockwell C191 1/2"SteelPartially Threaded11/16"Right Hand120000 psi£88.48
LU04210.112.0400Structural BoltRockwell C192"SteelPartially Threaded11/16"Right Hand120000 psi£96.34
MU04211.112.0550Structural Bolt With NutRockwell C193 1/2"SteelPartially Threaded11/16"Right Hand120000 psi£63.29
NU04211.112.0325Structural Bolt With NutRockwell C191 1/4"SteelPartially Threaded11/16"Right Hand120000 psi£39.31
OU04211.112.0800Structural Bolt With NutRockwell C196"SteelPartially Threaded11/16"Right Hand120000 psi£80.35
PU04211.112.0300Structural Bolt With NutRockwell C191"SteelPartially Threaded11/16"Right Hand120000 psi£43.78
QU04211.112.0650Structural Bolt With NutRockwell C194 1/2"SteelPartially Threaded11/16"Right Hand120000 psi£62.42
MU04211.112.0500Structural Bolt With NutRockwell C193"SteelPartially Threaded11/16"Right Hand120000 psi£44.95
QU04211.112.0700Structural Bolt With NutRockwell C195"SteelPartially Threaded11/16"Right Hand120000 psi£65.45
MU04211.112.0600Structural Bolt With NutRockwell C194"SteelPartially Threaded11/16"Right Hand120000 psi£84.37
MU04211.112.0450Structural Bolt With NutRockwell C192 1/2"SteelPartially Threaded11/16"Right Hand120000 psi£59.65
MU04211.112.0425Structural Bolt With NutRockwell C192 1/4"SteelPartially Threaded11/16"Right Hand120000 psi£56.32
OU04211.112.0900Structural Bolt With NutRockwell C257"SteelPartially Threaded11/16"Right Hand120000 psi£85.12
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1/2"-13 Coarse Hot Dipped Galvanized Grade A325 Type 1 Structural Bolts

StyleModelTypeGrip SizeMaterialThread StyleHead HeightThread DirectionHardnessTensile StrengthPrice (inc. VAT)Pkg. Qty.
AU04210.050.0175Structural Bolt3/4"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£61.091
BU04210.050.0350Structural Bolt2 1/2"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£58.941
CU04210.050.0125Structural Bolt1/4"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£52.731
DU04210.050.0200Structural Bolt1"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£59.001
EU04210.050.0250Structural Bolt1 1/2"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£78.111
FU04210.050.0300Structural Bolt2"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£78.6125
GU04210.050.0325Structural Bolt2 1/4"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£54.561
HU04210.050.0275Structural Bolt1 3/4"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£45.901
IU04210.050.0375Structural Bolt2 3/4"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£68.6825
IU04210.050.0400Structural Bolt3"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£65.181
JU04210.050.0150Structural Bolt1/2"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£48.341
EU04210.050.0225Structural Bolt1 1/4"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£63.191
KB04211.050.0125Structural Bolt With Nut1/4"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£86.41125
KU04211.050.0225Structural Bolt With Nut1 1/4"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£22.761
KU04211.050.0175Structural Bolt With Nut3/4"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£72.6825
LU04211.050.0300Structural Bolt With Nut2"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£27.021
LU04211.050.0250Structural Bolt With Nut1 1/2"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£37.061
MHCI30500200NGUSA-1240BXStructural Bolt With Nut1"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£1,952.631
NU04211.050.0375Structural Bolt With Nut2 3/4"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£31.161
NU04211.050.0325Structural Bolt With Nut2 1/4"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£32.781
LU04211.050.0275Structural Bolt With Nut1 3/4"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£45.891
NU04211.050.0400Structural Bolt With Nut3"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£37.491
NU04211.050.0350Structural Bolt With Nut2 1/2"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£34.131
KU04211.050.0200Structural Bolt With Nut1"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£40.021
KU04211.050.0125Structural Bolt With Nut1/4"SteelPartially Threaded5/16"Right HandRockwell C25120000 psi£22.141
-

3/4"-10 Coarse Black Oxide Grade A490 Type 1 Structural Bolts

StyleModelGrip SizeMaterialThread StyleHead HeightTypeThread DirectionHardnessTensile StrengthPrice (inc. VAT)Pkg. Qty.
AU04008.075.02501 1/8"SteelPartially Threaded15/32"Structural BoltRight HandRockwell C25120000 psi£52.001
AU04008.075.02751 3/8"SteelPartially Threaded15/32"Structural BoltRight HandRockwell C25120000 psi£61.151
BU04008.075.03001 5/8"SteelPartially Threaded15/32"Structural BoltRight HandRockwell C25120000 psi£36.121
BU04008.075.03251 7/8"SteelPartially Threaded15/32"Structural BoltRight HandRockwell C25120000 psi£67.501
BB04008.075.03251 7/8"SteelPartially Threaded15/32"Structural BoltRight HandRockwell C25120000 psi-50
RFQ
AU04008.075.01501/8"SteelPartially Threaded15/32"Structural BoltRight HandRockwell C25120000 psi£43.681
BU04008.075.03502 1/8"SteelPartially Threaded15/32"Structural BoltRight HandRockwell C25120000 psi£71.331
BU04008.075.03752 3/8"SteelPartially Threaded15/32"Structural BoltRight HandRockwell C25120000 psi£71.341
BU04008.075.04002 5/8"SteelPartially Threaded15/32"Structural BoltRight HandRockwell C25120000 psi£79.851
BU04008.075.04252 7/8"SteelPartially Threaded15/32"Structural BoltRight HandRockwell C25120000 psi£82.181
BU04008.075.04503 1/8"SteelPartially Threaded15/32"Structural BoltRight HandRockwell C25120000 psi£98.101
CU04008.075.04753 3/8"SteelPartially Threaded15/32"Structural BoltRight HandRockwell C25120000 psi£98.391
CU04008.075.05003 5/8"SteelPartially Threaded15/32"Structural BoltRight HandRockwell C25120000 psi£102.491
DU04008.075.05253 7/8"SteelPartially Threaded15/32"Structural BoltRight HandRockwell C25120000 psi£99.771
AU04008.075.01753/8"SteelPartially Threaded15/32"Structural BoltRight HandRockwell C25120000 psi£47.351
DU04008.075.05504 1/8"SteelPartially Threaded15/32"Structural BoltRight HandRockwell C25120000 psi£168.381
DU04008.075.06004 5/8"SteelPartially Threaded15/32"Structural BoltRight HandRockwell C25120000 psi£110.361
DU04008.075.06505 1/8"SteelPartially Threaded15/32"Structural BoltRight HandRockwell C25120000 psi£131.541
DU04008.075.07005 5/8"SteelPartially Threaded15/32"Structural BoltRight HandRockwell C25120000 psi£156.061
AU04008.075.02005/8"SteelPartially Threaded15/32"Structural BoltRight HandRockwell C25120000 psi£48.741
EU04008.075.08006 5/8"SteelPartially Threaded15/32"Structural BoltRight HandRockwell C25120000 psi£165.941
AU04008.075.02257/8"SteelPartially Threaded15/32"Structural BoltRight HandRockwell C25120000 psi£52.521
GRAINGER -

M24 x 3 Coarse Black Oxide Class 10.9 Structural Bolts

StyleModelGrip SizeMaterialThread StyleHead HeightTypeThread DirectionHardnessTensile StrengthPrice (inc. VAT)Pkg. Qty.
AM04005.240.006021 mmSteelPartially Threaded15 mmStructural BoltRight HandRockwell C32-C39145038 psi£373.461
AM04005.240.006526 mmSteelPartially Threaded15 mmStructural BoltRight HandRockwell C32-C39145038 psi£394.1925
BM04005.240.007031 mmSteelPartially Threaded15 mmStructural BoltRight HandRockwell C32-C39145038 psi£427.861
CM04005.240.008041 mmSteelPartially Threaded15 mmStructural BoltRight HandRockwell C32-C39145038 psi£675.801
DM04005.240.009051 mmSteelPartially Threaded15 mmStructural BoltRight HandRockwell C32-C39145038 psi£550.401
DM04005.240.010061 mmSteelPartially Threaded15 mmStructural BoltRight HandRockwell C32-C39145038 psi£504.081
DM04005.240.011071 mmSteelPartially Threaded15 mmStructural BoltRight HandRockwell C32-C39145038 psi£618.411
DM04005.240.012081 mmSteelPartially Threaded15 mmStructural BoltRight HandRockwell C32-C39145038 psi£691.241
DM04005.240.013091 mmSteelPartially Threaded15 mmStructural BoltRight HandRockwell C32-C39145038 psi£473.991
DM04005.240.0140101 mmSteelPartially Threaded15 mmStructural BoltRight HandRockwell C32-C39145038 psi£767.361
DM04005.240.0150111 mmSteelPartially Threaded15 mmStructural BoltRight HandRockwell C32-C39145038 psi£437.751
DISCO -

M8 x 1.25 Coarse Black Organic Structural Bolts

StyleModelMaterialThread StyleHead HeightTypeHead Dia.Head WidthDrive TypeHead TypePrice (inc. VAT)Pkg. Qty.
A5697PKSteelFully Threaded4.7 mmCA Body9.5 mm13 mmExternal HexHex Socket£17.0925
B9147PKSteelFully Threaded4.7 mmCA Body9.5 mm13 mmExternal HexHex Socket£22.611
GRAINGER -

M16 x 2 Coarse Hot Dipped Galvanized Class 10.9 Structural Bolts

StyleModelGrip SizeMaterialThread StyleHead HeightTypeThread DirectionHardnessTensile StrengthPrice (inc. VAT)
AM04210.160.004012 mmSteelPartially Threaded10 mmStructural BoltRight HandRockwell C32-C39145038 psi£247.00
BM04210.160.004517 mmSteelPartially Threaded10 mmStructural BoltRight HandRockwell C32-C39145038 psi£302.29
CM04210.160.005022 mmSteelPartially Threaded10 mmStructural BoltRight HandRockwell C32-C39145038 psi£279.37
CM04210.160.005527 mmSteelPartially Threaded10 mmStructural BoltRight HandRockwell C32-C39145038 psi£292.02
DM04210.160.006032 mmSteelPartially Threaded10 mmStructural BoltRight HandRockwell C32-C39145038 psi£305.11
EM04210.160.006537 mmSteelPartially Threaded10 mmStructural BoltRight HandRockwell C32-C39145038 psi£477.37
FM04210.160.007042 mmSteelPartially Threaded10 mmStructural BoltRight HandRockwell C32-C39145038 psi£340.36
GM04210.160.007547 mmSteelPartially Threaded10 mmStructural BoltRight HandRockwell C32-C39145038 psi£354.32
GM04210.160.008052 mmSteelPartially Threaded10 mmStructural BoltRight HandRockwell C32-C39145038 psi£183.36
GM04210.160.009062 mmSteelPartially Threaded10 mmStructural BoltRight HandRockwell C32-C39145038 psi£248.08
HM04210.160.010072 mmSteelPartially Threaded10 mmStructural BoltRight HandRockwell C32-C39145038 psi£232.99
IM04210.160.011082 mmSteelPartially Threaded10 mmStructural BoltRight HandRockwell C32-C39145038 psi£450.85
JM04210.160.012092 mmSteelPartially Threaded10 mmStructural BoltRight HandRockwell C32-C39145038 psi£301.75
JM04210.160.0150122 mmSteelPartially Threaded10 mmStructural BoltRight HandRockwell C32-C39145038 psi£419.42
FABORY -

5/8"-11 Coarse Hot Dipped Galvanized Grade A394 Type 0 Structural Bolts

StyleModelThread StyleHead HeightGrip SizeHead Dia.MaterialTypeThread DirectionHardnessPrice (inc. VAT)Pkg. Qty.
AU08440.062.0150Fully Threaded27/64"-15/16"SteelTower BoltRight HandRockwell B80£17.5710
AU08440.062.0200Fully Threaded27/64"-15/16"SteelTower BoltRight HandRockwell B80£19.5510
AU08440.062.0175Fully Threaded27/64"-15/16"SteelTower BoltRight HandRockwell B80£19.181
BU08440.062.0250Partially Threaded27/64"1"15/16"SteelTower BoltRight HandRockwell B80£25.901
BU08440.062.0300Partially Threaded1/2"1 1/2"1 1/8"SteelTower BoltRight HandRockwell B80£30.181
BU08440.062.0225Partially Threaded27/64"3/4"15/16"SteelTower BoltRight HandRockwell B80£22.8410
FABORY -

3/4"-10 Coarse Hot Dipped Galvanized Grade A394 Type 1 Structural Bolts

StyleModelThread StyleHead HeightGrip SizeHead Dia.MaterialTypeThread DirectionHardnessPrice (inc. VAT)Pkg. Qty.
AU08441.075.0200Fully Threaded1/2"-1 1/8"SteelTower BoltRight HandRockwell C25£34.861
AU08441.075.0225Fully Threaded1/2"-1 1/8"SteelTower BoltRight HandRockwell C25£34.751
AU08441.075.0150Fully Threaded1/2"-1 1/8"SteelTower BoltRight HandRockwell C25£31.931
AU08441.075.0175Fully Threaded1/2"-1 1/8"SteelTower BoltRight HandRockwell C25£32.7610
BU08441.075.0325Partially Threaded27/64"1 1/2"15/16"SteelTower BoltRight HandRockwell C25£46.661
BU08441.075.0250Partially Threaded1/2"3/4"1 1/8"SteelTower BoltRight HandRockwell C25£37.641
BU08441.075.0275Partially Threaded1/2"1"1 1/8"SteelTower BoltRight HandRockwell C25£43.341
BU08441.075.0350Partially Threaded1/2"1 3/4"1 1/8"SteelTower BoltRight HandRockwell C25£49.581
BU08441.075.0300Partially Threaded1/2"1 1/4"1 1/8"SteelTower BoltRight HandRockwell C25£43.781
-

1"-8 Coarse Hot Dipped Galvanized Grade A325 Type 1 Structural Bolts

StyleModelThread StyleTypeGrip SizeMaterialHead HeightThread DirectionHardnessTensile StrengthPrice (inc. VAT)Pkg. Qty.
AU04211.100.0225Fully ThreadedStructural Bolt With Nut-Steel39/64"Right HandRockwell C25120000 psi£33.831
BU04210.100.0350Partially ThreadedStructural Bolt1 3/4"Steel39/64"Right HandRockwell C25120000 psi£91.821
CU04211.100.0450Partially ThreadedStructural Bolt With Nut2 3/4"Steel39/64"Right HandRockwell C25120000 psi£40.911
CU04211.100.0500Partially ThreadedStructural Bolt With Nut3 1/4"Steel39/64"Right HandRockwell C25120000 psi£73.321
DU04210.100.0325Partially ThreadedStructural Bolt1 1/2"Steel39/64"Right HandRockwell C25120000 psi£55.611
EU04210.100.0800Partially ThreadedStructural Bolt6 1/4"Steel39/64"Right HandRockwell C25120000 psi£125.545
FU04211.100.0350Partially ThreadedStructural Bolt With Nut1 3/4"Steel39/64"Right HandRockwell C25120000 psi£42.841
GU04210.100.0200Partially ThreadedStructural Bolt1/4"Steel39/64"Right HandRockwell C25120000 psi£60.781
HU04211.100.0275Partially ThreadedStructural Bolt With Nut1"Steel39/64"Right HandRockwell C25120000 psi£38.141
IU04210.100.0400Partially ThreadedStructural Bolt2 1/4"Steel39/64"Right HandRockwell C25120000 psi£96.541
HU04211.100.0250Partially ThreadedStructural Bolt With Nut3/4"Steel39/64"Right HandRockwell C25120000 psi£36.951
FU04211.100.0375Partially ThreadedStructural Bolt With Nut2"Steel39/64"Right HandRockwell C25120000 psi£46.661
JU04211.100.0750Partially ThreadedStructural Bolt With Nut5 3/4"Steel39/64"Right HandRockwell C25120000 psi£38.801
KU04210.100.0750Partially ThreadedStructural Bolt5 3/4"Steel39/64"Right HandRockwell C25120000 psi£103.815
LU04210.100.0275Partially ThreadedStructural Bolt1"Steel39/64"Right HandRockwell C25120000 psi£77.941
MU04210.100.0700Partially ThreadedStructural Bolt5 1/4"Steel39/64"Right HandRockwell C25120000 psi£118.761
NU04210.100.0650Partially ThreadedStructural Bolt4 3/4"Steel39/64"Right HandRockwell C25120000 psi£108.921
FU04211.100.0325Partially ThreadedStructural Bolt With Nut1 1/2"Steel39/64"Right HandRockwell C25120000 psi£52.791
OU04210.100.0250Partially ThreadedStructural Bolt3/4"Steel39/64"Right HandRockwell C25120000 psi£72.771
PU04210.100.0300Partially ThreadedStructural Bolt1 1/4"Steel39/64"Right HandRockwell C25120000 psi£81.361
GU04210.100.0225Partially ThreadedStructural Bolt1/2"Steel39/64"Right HandRockwell C25120000 psi£46.141
QU04210.100.0450Partially ThreadedStructural Bolt2 3/4"Steel39/64"Right HandRockwell C25120000 psi£101.631
CU04211.100.0425Partially ThreadedStructural Bolt With Nut2 1/2"Steel39/64"Right HandRockwell C25120000 psi£90.915
RU04210.100.0425Partially ThreadedStructural Bolt2 1/2"Steel39/64"Right HandRockwell C25120000 psi£65.845
SU04211.100.0800Partially ThreadedStructural Bolt With Nut6 1/4"Steel39/64"Right HandRockwell C25120000 psi£76.781
-

1 1/4"-7 Coarse Hot Dipped Galvanized Grade A325 Type 1 Structural Bolts

StyleModelTypeHardnessGrip SizeMaterialThread StyleHead HeightThread DirectionTensile StrengthPrice (inc. VAT)Pkg. Qty.
AU04210.125.0350Structural BoltRockwell C191 1/2"SteelPartially Threaded25/32"Right Hand120000 psi£104.721
BU04210.125.0800Structural BoltRockwell C196"SteelPartially Threaded25/32"Right Hand120000 psi£150.721
CU04210.125.0550Structural BoltRockwell C193 1/2"SteelPartially Threaded25/32"Right Hand120000 psi£154.681
DU04210.125.0650Structural BoltRockwell C194 1/2"SteelPartially Threaded25/32"Right Hand120000 psi£182.391
DU04210.125.0600Structural BoltRockwell C194"SteelPartially Threaded25/32"Right Hand120000 psi£152.651
EU04210.125.0300Structural BoltRockwell C191"SteelPartially Threaded25/32"Right Hand120000 psi£100.191
FU04210.125.0450Structural BoltRockwell C192 1/2"SteelPartially Threaded25/32"Right Hand120000 psi£125.751
DU04210.125.0700Structural BoltRockwell C195"SteelPartially Threaded25/32"Right Hand120000 psi£192.731
GU04210.125.0500Structural BoltRockwell C193"SteelPartially Threaded25/32"Right Hand120000 psi£143.091
EU04210.125.0325Structural BoltRockwell C191 1/4"SteelPartially Threaded25/32"Right Hand120000 psi£99.671
HU04210.125.0400Structural BoltRockwell C192"SteelPartially Threaded25/32"Right Hand120000 psi£113.901
IU04210.125.0425Structural BoltRockwell C192 1/4"SteelPartially Threaded25/32"Right Hand120000 psi£121.181
JU04211.125.0450Structural Bolt With NutRockwell C192 1/2"SteelPartially Threaded25/32"Right Hand120000 psi£61.841
KU04211.125.0600Structural Bolt With NutRockwell C254"SteelPartially Threaded25/32"Right Hand120000 psi£81.465
LU04211.125.0400Structural Bolt With NutRockwell C192"SteelPartially Threaded25/32"Right Hand120000 psi£160.405
KU04211.125.0800Structural Bolt With NutRockwell C256"SteelPartially Threaded25/32"Right Hand120000 psi£97.015
KU04211.125.0550Structural Bolt With NutRockwell C253 1/2"SteelPartially Threaded25/32"Right Hand120000 psi£178.431
KU04211.125.0500Structural Bolt With NutRockwell C253"SteelPartially Threaded25/32"Right Hand120000 psi£170.091
JU04211.125.0425Structural Bolt With NutRockwell C192 1/4"SteelPartially Threaded25/32"Right Hand120000 psi£63.651
MU04211.125.0300Structural Bolt With NutRockwell C191"SteelPartially Threaded25/32"Right Hand120000 psi£121.745
LU04211.125.0350Structural Bolt With NutRockwell C191 1/2"SteelPartially Threaded25/32"Right Hand120000 psi£151.255
LU04211.125.0325Structural Bolt With NutRockwell C191 1/4"SteelPartially Threaded25/32"Right Hand120000 psi£109.631
GRAINGER -

1 1/4"-7 Coarse Black Oxide Grade A490 Type 1 Structural Bolts

StyleModelGrip SizeMaterialThread StyleHead HeightTypeThread DirectionHardnessTensile StrengthPrice (inc. VAT)
AU04008.125.03501 1/2"SteelPartially Threaded25/32"Structural BoltRight HandRockwell C25120000 psi£148.25
AU04008.125.03251 1/4"SteelPartially Threaded25/32"Structural BoltRight HandRockwell C25120000 psi£140.47
AU04008.125.03001"SteelPartially Threaded25/32"Structural BoltRight HandRockwell C25120000 psi£134.52
AU04008.125.04502 1/2"SteelPartially Threaded25/32"Structural BoltRight HandRockwell C25120000 psi£183.13
AU04008.125.04252 1/4"SteelPartially Threaded25/32"Structural BoltRight HandRockwell C25120000 psi£176.69
AU04008.125.04002"SteelPartially Threaded25/32"Structural BoltRight HandRockwell C25120000 psi£160.18
BU04008.125.05503 1/2"SteelPartially Threaded25/32"Structural BoltRight HandRockwell C25120000 psi£209.74
BU04008.125.05003"SteelPartially Threaded25/32"Structural BoltRight HandRockwell C25120000 psi£196.45
BU04008.125.06504 1/2"SteelPartially Threaded25/32"Structural BoltRight HandRockwell C25120000 psi£247.94
BU04008.125.06004"SteelPartially Threaded25/32"Structural BoltRight HandRockwell C25120000 psi£222.23
BU04008.125.07005"SteelPartially Threaded25/32"Structural BoltRight HandRockwell C25120000 psi£262.13
CU04008.125.08006"SteelPartially Threaded25/32"Structural BoltRight HandRockwell C25120000 psi£291.44
12...1112

Structural Bolts

Structural bolts are heavy hex bolts constructed of medium carbon steel. They have a flat bearing surface, washer face and chamfered point. They are commonly used in heavy-duty structural steel joints.

Frequently Asked Questions

What are the different bolting methods?

  • Nut Turning: Turn the nut or bolt of a fastener assembly at a particular angle based on the length and diameter of the fastener, while ensuring that the surface does not rotate.
  • Calibrated Wrench: Apply an average torque value based on daily testing of your representative fastener assembly samples. They are based on the exact configuration of power supplies & tools under conditions as close together as possible, within one day or less.

What is ASTM A325 standard?

The American Society for Testing and Materials (ASTM) is in charge of establishing standards for various tools and industries. Although these standards are voluntary, most fabricators follow them as it increases customer trust. The A325 standard, in addition to ASTM A563 and A194, applies to heavy hex structural bolts. This standard specifies the mechanical properties of bolts with diameters ranging from.5 to 1.5 inches. A325M, the equivalent metric standard, defines mechanical properties for bolts having M12 to M36 sizes. The ASTM A325 designation was replaced in 2016 by ASTM F3125. However, the markings on bolt heads remain the same to avoid confusion.

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