How to install a lock washer?

Place the lock washer between the threaded fastener (like a nut) and the screw / bolt head. Make sure that the lock washer press against the fastener & other adjacent surfaces and forms a tight connection. Press the fastener down to lock the grooves of a tooth lock washer with the grooves of the nut. Use a wrench or ratchet to tighten the nut or threaded fastener. Make sure that the teeth of the tooth lock washer are covered completely by the nut / fastener head, or that the split lock washer is slightly out of alignment to indicate tension on the threaded fastener. Users may loosen the nut / threaded fastener to adjust the washer if it is not operating correctly.

How to remove a lock washer?

After the operation is completed, the washer can be removed by simply removing the nut / threaded fastener that is holding the washer in place using a vise-grip or pipe wrench. Use a flat screwdriver to pry the lock washer off. When removing a split washer, the screwdriver head should be placed inside the split or beneath the washer and pushed. When removing a washer having teeth, the screwdriver head should be placed under a tooth and pushed up, repeating the procedure with more teeth if required. For other lock washer types, the screwdriver head can be placed below the washer and pushed up. The washer may break during removal, depending on the amount of pressure being applied. If the lock washer does not budge, use penetrating oil and repeat the previous step. Some lock washers can be used multiple times easily. Other washers (split lock) can be used only 1 or 2 times. Users should not reuse a split lock washer or other damaged washers. Do not use old washers in high-stress joint applications.

What is the difference between lock washers and flat washers?

Flat washers are suitable for increasing the surface area and distributing the applied force when tightening the fastener. They can be used on the fastener's bolt & nut sides, or used as spacers where using a bolt may not be suitable. Lock washers create tension during tightening to prevent the loosening of nuts. They are generally used on the fastener's nut side for applications involving vibrations.

Which type of lock washers has the highest vibration resistance?

Split Lock, Tooth Lock, Diamond-Coated Lock, Spring Lock and Wedge Lock type lock washers have vibration resistance in ascending or increasing order.

Lock Washers - Page 3 | Raptor Supplies United Kingdom

APPROVED VENDOR -

Plain Steel Internal Tooth Lock Washers

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D

E

F

G

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L

M

N

O

P

Q

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Hardness	Thickness	Class	Color	Price (inc. VAT)	Pkg. Qty.
A	B37320.050.0001	#4	0.512"	22/25"	-	0.055"	-	-	£4,031.55	6750
B	B37320.062.0001	#6	16/25"	1.1"	-	0.059"	-	-	£13,338.13	5000
C	B37320.025.0001	#6	0.256"	1/2"	-	0.035"	-	-	£8,670.00	37000
D	B37320.031.0001	#8	8/25"	0.59"	-	1/25"	-	-	£8,492.01	17200
E	B37320.037.0001	#10	0.384"	0.7"	-	0.042"	-	-	£8,674.96	13150
B	B37320.075.0001	#10	0.768"	1 6/25"	-	0.071"	-	-	£13,794.63	2970
F	U37320.050.0001	1/2"	0.512"	22/25"	Rockwell C40-C50	0.055"	Not Applicable	-	£14.17	25
G	U37320.025.0001	1/4"	0.256"	1/2"	Rockwell C40-C50	0.035"	Not Applicable	-	£21.06	100
H	U37320.075.0001	3/4"	0.768"	1 6/25"	Rockwell C40-C50	0.071"	Not Applicable	-	£44.03	10
I	U37320.037.0001	3/8"	0.384"	1.7"	Rockwell C40-C50	0.042"	Not Applicable	-	£31.45	50
J	U37320.062.0001	5/8"	16/25"	1.1"	Rockwell C40-C50	0.059"	Not Applicable	-	£25.32	10
K	U37320.031.0001	5/16"	8/25"	0.59"	Rockwell C40-C50	1/25"	Not Applicable	-	£46.86	100
B	L37320.030.0001	M3	3.2 mm	6 mm	-	0.4 mm	-	Silver	£4,670.10	90000
L	L37320.040.0001	M4	4.3 mm	8 mm	-	0.5 mm	-	Silver	£2,146.95	50000
M	L37320.050.0001	M5	5.3 mm	10 mm	-	0.6 mm	-	Silver	£3,287.42	50000
N	L37320.060.0001	M6	6.4 mm	11 mm	-	0.7 mm	-	Silver	£2,212.55	40000
O	L37320.080.0001	M8	8.4 mm	15 mm	-	0.8 mm	-	Silver	£1,619.21	18100
P	L37320.100.0001	M10	10.5 mm	18 mm	-	0.9 mm	-	Silver	£2,147.98	11100
Q	M37320.120.0001	M12	13 mm	20.5 mm	Rockwell C35-C42	1 mm	Not Applicable	-	£11.78	50

APPROVED VENDOR -

Zinc Plated Steel Countersunk External Tooth Lock Washers

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Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Class	Type	Material	Grade	Price (inc. VAT)	Pkg. Qty.
A	B37500.016.0001	#4	0.167"	0.322"	0.017"	-	Countersunk External Tooth Lock	Steel	-	£2,276.87	50000
B	B37500.037.0001	#4	0.383"	0.765"	0.028"	-	Countersunk External Tooth Lock	Steel	-	£3,265.67	13150
C	U37500.013.0001	#6	0.14"	0.289"	0.017"	Not Applicable	Countersunk External Tooth Lock	Steel	Non Graded	£5.68	100
D	B37500.019.0001	#6	0.195"	0.354"	0.02"	-	Countersunk External Tooth Lock	Steel	-	£2,750.10	50000
E	U37500.016.0001	#8	0.167"	0.322"	0.017"	Not Applicable	Countersunk External Tooth Lock	Steel	Non Graded	£4.32	100
F	B37500.021.0001	#8	0.22"	0.421"	0.02"	-	Countersunk External Tooth Lock	Steel	-	£3,687.48	31200
G	U37500.019.0001	#10	0.195"	0.354"	0.02"	Not Applicable	Countersunk External Tooth Lock	Steel	Non Graded	£5.24	100
H	B37500.025.0001	#10	0.255"	0.454"	0.02"	-	Countersunk External Tooth Lock	Steel	-	£1,855.64	29400
I	U37500.021.0001	#12	0.22"	0.421"	0.02"	Not Applicable	Countersunk External Tooth Lock	Steel	Non Graded	£11.20	100
J	U37500.025.0001	1/4"	0.255"	0.454"	0.02"	Not Applicable	Countersunk External Tooth Lock	Steel	Non Graded	£5.98	100
K	U37500.037.0001	3/8"	0.383"	0.765"	0.028"	Not Applicable	Countersunk External Tooth Lock	Steel	Non Graded	£11.82	50
L	U37500.031.0001	5/16"	0.318"	0.599"	0.023"	Not Applicable	Countersunk External Tooth Lock	Steel	Non Graded	£10.61	100

GRAINGER -

Yellow Zinc Plated Spring Steel Split Lock Washers

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C

D

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Color	Class	Type	Material	Price (inc. VAT)	Pkg. Qty.
A	M37060.030.0001	M3	3.1 mm	6.2 mm	0.8 mm	Gray	-	Split Lock	Spring Steel	£4.02	100
A	M37060.040.0001	M4	4.1 mm	7.6 mm	0.9 mm	Gray	-	Split Lock	Spring Steel	£3.81	100
A	M37060.050.0001	M5	5.1 mm	9.2 mm	1.2 mm	Gray	-	Split Lock	Spring Steel	£8.62	100
B	M37060.060.0001	M6	6.1 mm	11.8 mm	1.6 mm	Silver	Not Applicable	Split Lock	Spring Steel	£8.06	100
A	M37060.070.0001	M7	7.1 mm	12.8 mm	1.6 mm	Gray	-	Split Lock	Spring Steel	£14.80	100
A	M37060.080.0001	M8	8.1 mm	14.8 mm	2 mm	Gray	-	Split Lock	Spring Steel	£9.28	100
C	M37060.100.0001	M10	10.2 mm	18.1 mm	2.2 mm	Silver	Not Applicable	Split Lock	Spring Steel	£7.64	100
A	M37060.120.0001	M12	12.2 mm	21.1 mm	2.5 mm	Gray	-	Split Lock	Spring Steel	£21.59	100
A	M37060.140.0001	M14	14.2 mm	24.1 mm	3 mm	Gray	-	Split Lock	Spring Steel	£30.45	100
D	M37060.160.0001	M16	16.2 mm	27.4 mm	3.5 mm	Silver	Not Applicable	Split Lock	Spring Steel	£25.60	50
A	M37060.180.0001	M18	18.2 mm	29.4 mm	3.5 mm	Gray	-	Split Lock	Spring Steel	£28.91	50
A	M37060.200.0001	M20	20.2 mm	33.6 mm	4 mm	Gray	-	Split Lock	Spring Steel	£15.41	25
A	M37060.220.0001	M22	22.5 mm	35.9 mm	4 mm	Gray	-	Split Lock	Spring Steel	£28.57	25

ARMOR COAT -

Armor Coat Steel Split Lock Washers

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D

E

F

G

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Hardness	Color	Thickness Tolerance	Price (inc. VAT)	Pkg. Qty.
A	UST236050	1/2"	0.512"	0.879"	1/8"	Rockwell C33-C39	Silver	-0.006" to +0.006"	£10.18	25
B	UST236046	1/4"	0.26"	0.489"	1/16"	Rockwell C33-C39	Silver	-0.006" to +0.006"	£6.37	100
C	UST236052	3/4"	0.766"	1.285"	3/16"	Rockwell C33-C39	Silver	-0.006" to +0.006"	£17.16	20
D	UST236048	3/8"	0.385"	11/16"	3/32"	Rockwell C33-C39	Silver	-0.006" to +0.006"	£10.66	50
E	UST236051	5/8"	0.641"	1.087"	0.156"	Rockwell C33-C39	Silver	-0.006" to +0.006"	£19.60	25
F	UST236047	5/16"	0.322"	0.593"	0.0781"	Rockwell C33-C39	Silver	-0.006" to +0.006"	£3.65	50
G	UST236049	7/16"	0.45"	0.784"	0.109"	Rockwell C33-C39	Silver	-0.006" to +0.006"	£7.56	25

DISC-LOCK -

Zinc Plated Steel Wedge Lock Washers

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E

F

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Hardness	Thickness	Color	Thickness Tolerance	Price (inc. VAT)	Pkg. Qty.
A	099-01	#8	0.175"	0.34"	Rockwell C40-C55	2/25"	Silver	-	£101.83	200
B	2397	1/2"	13/25"	0.768"	Rockwell C46	9/64"	Gray	-0.28 mm to +0.28 mm	£324.11	200
C	098-M1	3 mm	3.81 mm	8.6 mm	Rockwell C40-C55	2.03 mm	Silver	-	£89.27	200
B	2403	3/4"	0.779"	1.209"	Rockwell C46	0.2188"	Gray	-0.28 mm to +0.28 mm	£396.70	100
B	2393	3/8"	0.394"	0.654"	Rockwell C46	0.102"	Gray	-0.28 mm to +0.28 mm	£219.07	200
D	100-01	3/16"	0.203"	0.401"	Rockwell C40-C55	2/25"	Silver	-	£102.29	200
E	099-M1	4 mm	4.45 mm	8.6 mm	Rockwell C40-C55	2.03 mm	Silver	-	£92.40	200
F	100-M1	5 mm	5.15 mm	10.2 mm	Rockwell C40-C55	2.03 mm	Silver	-	£89.27	200
B	3303	6 mm	6.3 mm	10.8 mm	Rockwell C46	1.77 mm	Gray	-0.28 mm to +0.28 mm	£180.86	200
B	2618	6 mm	6.3 mm	13.5 mm	Rockwell C46	1.77 mm	Gray	-0.28 mm to +0.28 mm	£193.18	200
B	2373	8 mm	8.4 mm	13.5 mm	Rockwell C46	2.29 mm	Gray	-0.28 mm to +0.28 mm	£193.18	200
B	2374	8 mm	8.4 mm	16.6 mm	Rockwell C46	2.29 mm	Gray	-0.28 mm to +0.28 mm	£217.78	200
B	2621	10 mm	10.5 mm	21 mm	Rockwell C46	2.95 mm	Gray	-0.28 mm to +0.28 mm	£368.19	200
B	2375	10 mm	10.5 mm	16.6 mm	Rockwell C46	2.95 mm	Gray	-0.28 mm to +0.28 mm	£219.07	200
B	2377	12 mm	12.5 mm	25.4 mm	Rockwell C46	3.5 mm	Gray	-0.28 mm to +0.28 mm	£264.45	100
B	2376	12 mm	12.5 mm	19.5 mm	Rockwell C46	3.5 mm	Gray	-0.28 mm to +0.28 mm	£365.59	200
B	2399	14 mm	14.6 mm	23 mm	Rockwell C46	4.03 mm	Gray	-0.28 mm to +0.28 mm	£241.13	100
B	2379	16 mm	16.6 mm	30.7 mm	Rockwell C46	4.74 mm	Gray	-0.28 mm to +0.28 mm	£396.70	100
B	2378	16 mm	16.6 mm	25.4 mm	Rockwell C46	4.74 mm	Gray	-0.28 mm to +0.28 mm	£264.45	100
B	2380	20 mm	20.7 mm	30.7 mm	Rockwell C46	6.01 mm	Gray	-0.32 mm to +0.32 mm	£396.70	100

APPROVED VENDOR -

Furnace Black Steel Internal Tooth Lock Washers

A

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Class	Hardness	Type	Material	Price (inc. VAT)	Pkg. Qty.
A	M37320.030.0001	M3	3.2 mm	6 mm	0.4 mm to 0.8 mm	Not Applicable	Rockwell C35-C42	Internal Tooth Lock	Steel	£4.62	100
A	M37320.040.0001	M4	4.3 mm	8 mm	0.5 mm to 1 mm	Not Applicable	Rockwell C35-C42	Internal Tooth Lock	Steel	£4.05	100
A	M37320.050.0001	M5	5.3 mm	10 mm	0.6 mm to 1.2 mm	Not Applicable	Rockwell C35-C42	Internal Tooth Lock	Steel	£5.50	100
A	M37320.060.0001	M6	6.4 mm	11 mm	0.7 mm to 1.4 mm	Not Applicable	Rockwell C35-C42	Internal Tooth Lock	Steel	£5.18	100
A	M37320.080.0001	M8	8.4 mm	15 mm	0.8 mm to 1.6 mm	Not Applicable	Rockwell C35-C42	Internal Tooth Lock	Steel	£10.02	100
A	M37320.100.0001	M10	10.5 mm	18 mm	0.9 mm to 1.8 mm	Not Applicable	Rockwell C35-C42	Internal Tooth Lock	Steel	£14.57	100

APPROVED VENDOR -

Furnace Black Steel Split Lock Washers

A

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Thickness Tolerance	Class	Hardness	Price (inc. VAT)	Pkg. Qty.
A	M37200.030.0001	M3	3.1 mm	5.6 mm	1 mm	-	Not Applicable	Rockwell C44-C51	£5.15	100
A	M37000.030.0001	M3	3.1 mm	6.2 mm	0.8 mm	-0.1 mm to +0.1 mm	Not Applicable	Rockwell C44-C51	£3.21	100
A	M37000.035.0001	M3.5	3.6 mm	6.7 mm	0.8 mm	-0.1 mm to +0.1 mm	Not Applicable	Rockwell C44-C51	£3.28	100
A	M37000.040.0001	M4	4.1 mm	7.6 mm	0.9 mm	-0.1 mm to +0.1 mm	Not Applicable	Rockwell C44-C51	£1.98	100
A	M37200.040.0001	M4	4.1 mm	7 mm	1.2 mm	-	Not Applicable	Rockwell C44-C51	£3.45	100
A	M37000.050.0001	M5	5.1 mm	9.2 mm	1.2 mm	-0.1 mm to +0.1 mm	Not Applicable	Rockwell C44-C51	£1.30	100
A	M37200.050.0001	M5	5.1 mm	8.8 mm	1.6 mm	-	Not Applicable	Rockwell C44-C51	£6.22	100
A	M37000.060.0001	M6	6.1 mm	11.8 mm	1.6 mm	-0.1 mm to +0.1 mm	Not Applicable	Rockwell C44-C51	£2.32	100
A	M37200.060.0001	M6	6.1 mm	9.9 mm	1.6 mm	-	Not Applicable	Rockwell C44-C51	£2.33	100
A	M37000.080.0001	M8	8.1 mm	14.8 mm	2 mm	-0.1 mm to +0.1 mm	Not Applicable	Rockwell C44-C51	£3.40	100
A	M37200.080.0001	M8	8.1 mm	12.7 mm	2 mm	-	Not Applicable	Rockwell C44-C51	£4.06	100
A	M37000.100.0001	M10	10.2 mm	18.1 mm	2.2 mm	-0.15 mm to +0.15 mm	Not Applicable	Rockwell C44-C51	£3.90	100
A	M37200.100.0001	M10	10.2 mm	16 mm	2.5 mm	-0.127 mm to +0.127 mm	Not Applicable	Rockwell C44-C51	£3.54	100

APPROVED VENDOR -

Furnace Black Spring Steel Split Lock Washers

A

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Class	Hardness	Thickness Tolerance	Price (inc. VAT)	Pkg. Qty.
A	LW7S00200-100P1	M2	2.1 mm	4.4 mm	0.5 mm	Not Applicable	Rockwell C44-C51	-0.1 mm to +0.1 mm	£3.50	100
A	LW7S00250-100P1	M2.5	2.6 mm	5.1 mm	0.6 mm	Not Applicable	Rockwell C44-C51	-0.1 mm to +0.1 mm	£3.52	100
A	LW7S00260-100P1	M2.6	2.7 mm	5.2 mm	0.6 mm	Not Applicable	Rockwell C44-C51	-0.1 mm to +0.1 mm	£3.51	100

APPROVED VENDOR -

Zinc Plated Grade 1050-1065 Spring Steel Split Lock Washers

A

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Thickness Tolerance	Class	Hardness	Price (inc. VAT)	Pkg. Qty.
A	LWIS-100-100P	#10	1/5"	0.334"	0.047"	0.047" to 0.062"	Not Applicable	Rockwell C38-C46	£1.64	100
A	LWIS0250-100P	1/4"	0.26"	0.487"	1/16"	0.062" to 0.109"	Not Applicable	Rockwell C38-C46	£1.80	100
A	LWIS0370-100P	3/8"	0.385"	17/25"	3/32"	0.094" to 0.141"	Not Applicable	Rockwell C38-C46	£4.35	100

METRIC BLUE -

Metric Blue Steel Split Lock Washers

A

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Thickness Tolerance	Hardness	Type	Material	Price (inc. VAT)	Pkg. Qty.
A	UST187437	M3	3.5 mm	5.5 mm	1 mm	-0.1 mm to +0.1 mm	Rockwell C44-C51	Split Lock	Steel	£2.84	100
A	UST187438	M4	4.5 mm	6.5 mm	1.2 mm	-0.1 mm to +0.1 mm	Rockwell C44-C51	Split Lock	Steel	£5.51	100
A	UST187439	M5	5.5 mm	8.5 mm	1.6 mm	-0.1 mm to +0.1 mm	Rockwell C44-C51	Split Lock	Steel	£6.66	100
A	UST187440	M6	6.5 mm	9.5 mm	1.6 mm	-0.1 mm to +0.1 mm	Rockwell C44-C51	Split Lock	Steel	£7.73	100
A	UST182830	M6	6.5 mm	11.3 mm	1.7 mm	-0.1 mm to +0.1 mm	Rockwell C44-C51	Split Lock	Steel	£8.76	100
A	UST187441	M8	9 mm	12.5 mm	2 mm	-0.1 mm to +0.1 mm	Rockwell C44-C51	Split Lock	Steel	£9.58	100
A	UST182831	M8	8.5 mm	14.5 mm	2 mm	-0.1 mm to +0.1 mm	Rockwell C44-C51	Split Lock	Steel	£11.06	100
A	UST182832	M10	10.5 mm	17.5 mm	2.3 mm	-0.15 mm to +0.15 mm	Rockwell C44-C51	Split Lock	Steel	£17.78	100
A	UST187442	M10	10.5 mm	15.5 mm	2.5 mm	-0.15 mm to +0.15 mm	Rockwell C44-C51	Split Lock	Steel	£19.91	100
A	UST187443	M12	12.5 mm	17.5 mm	2.5 mm	-0.15 mm to +0.15 mm	Rockwell C44-C51	Split Lock	Steel	£23.62	100
A	UST182833	M12	13 mm	20 mm	2.5 mm	-0.15 mm to +0.15 mm	Rockwell C44-C51	Split Lock	Steel	£29.31	100
A	UST187445	M16	16.5 mm	23 mm	3.5 mm	-0.2 mm to +0.2 mm	Rockwell C44-C51	Split Lock	Steel	£44.18	100
A	UST182834	M16	16.5 mm	26.5 mm	3.6 mm	-0.2 mm to +0.2 mm	Rockwell C44-C51	Split Lock	Steel	£34.99	50
A	UST182835	M20	21 mm	32.5 mm	4.2 mm	-0.2 mm to +0.2 mm	Rockwell C44-C51	Split Lock	Steel	£62.81	50
A	UST187447	M20	21 mm	30 mm	4.6 mm	-0.2 mm to +0.2 mm	Rockwell C44-C51	Split Lock	Steel	£43.88	50
A	UST187449	M24	25 mm	35 mm	5 mm	-0.2 mm to +0.2 mm	Rockwell C44-C51	Split Lock	Steel	£60.97	25
A	UST182836	M24	25 mm	40 mm	4.9 mm	-0.2 mm to +0.2 mm	Rockwell C44-C51	Split Lock	Steel	£36.27	25

NORD-LOCK -

Plain Grade 316 Stainless Steel Wedge Lock Washers

A

B

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Hardness	Thickness	Thickness Tolerance	Color	Price (inc. VAT)	Pkg. Qty.
A	1069	#5	0.13"	7/25"	Rockwell C46	0.09"	-0.01" to +0.01"	Silver	£529.79	200
B	1071	#6	0.15"	0.35"	Rockwell C52	0.09"	-0.01" to +0.01"	Silver	£566.84	200
A	1070	#6	0.15"	0.3"	Rockwell C52	0.09"	-0.01" to +0.01"	Silver	£538.37	200
B	1074	#8	0.17"	0.35"	Rockwell C52	0.09"	-0.01" to +0.01"	Silver	£530.26	200
A	1072	#8	0.17"	0.3"	Rockwell C52	0.09"	-0.01" to +0.01"	Silver	£527.33	200
A	1075	#10	0.21"	0.35"	Rockwell C52	0.09"	-0.01" to +0.01"	Silver	£519.51	200
B	1079	#10	0.21"	0.43"	Rockwell C52	0.09"	-0.01" to +0.01"	Silver	£544.33	200
A	2807	1 1/2"	1.59"	2.3"	Rockwell C52	0.27"	-0.02" to +0.02"	Silver	£1,797.32	25
A	2733	1 1/4"	1.35"	1.91"	Rockwell C52	0.27"	-0.02" to +0.02"	Silver	£1,095.49	25
A	2722	1 1/8"	1 6/25"	1.85"	Rockwell C52	0.27"	-0.02" to +0.02"	Silver	£2,037.13	50
B	2745	1 1/8"	1 6/25"	2.3"	Rockwell C52	0.27"	-0.02" to +0.02"	Silver	£1,780.77	25
A	2902	1 3/4"	1.82"	2 19/25"	Rockwell C52	0.27"	-0.03" to +0.03"	Silver	£244.35	1
A	2732	1 3/8"	1.47"	2.17"	Rockwell C52	0.27"	-0.02" to +0.02"	Silver	£1,499.50	25
B	2746	1"	1.1"	1.91"	Rockwell C52	0.13"	-0.01" to +0.01"	Silver	£2,181.28	50
A	2734	1"	1.1"	1.54"	Rockwell C52	0.13"	-0.01" to +0.01"	Silver	£1,892.92	100
B	1110	1/2"	0.53"	1"	Rockwell C52	0.13"	-0.01" to +0.01"	Silver	£1,047.91	100
A	2149	1/2"	0.53"	0.77"	Rockwell C52	0.09"	-0.01" to +0.01"	Silver	£874.48	200
B	1086	1/4"	7/25"	0.53"	Rockwell C52	0.09"	-0.01" to +0.01"	Silver	£604.81	200
A	1085	1/4"	7/25"	0.45"	Rockwell C52	0.09"	-0.01" to +0.01"	Silver	£547.24	200
A	2907	2 1/2"	2 16/25"	3.74"	Rockwell C52	0.35"	-0.03" to +0.03"	Silver	£654.41	1
A	2905	2 1/4"	2.33"	3.35"	Rockwell C52	0.35"	-0.03" to +0.03"	Silver	£703.03	1
A	2904	2"	2.11"	3.15"	Rockwell C52	0.35"	-0.03" to +0.03"	Silver	£596.78	1
A	2910	3"	3.11"	4.33"	Rockwell C52	0.35"	-0.03" to +0.03"	Silver	£712.18	1
B	2740	3/4"	0.79"	1.54"	Rockwell C52	0.13"	-0.01" to +0.01"	Silver	£1,789.90	100
A	1121	3/4"	0.79"	1.21"	Rockwell C52	0.13"	-0.01" to +0.01"	Silver	£1,275.09	100

MIDWEST ACORN NUT -

Chrome Plated Steel Split Lock Washers

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B

C

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Hardness	Thickness Tolerance	Type	Material	Price (inc. VAT)	Pkg. Qty.
A	MPB1000	1/4"	0.26"	0.487"	1/16"	Rockwell C38-C46	-0.01" to +0.01"	Split Lock	Steel	£47.89	50
B	MPB1002	3/8"	0.385"	17/25"	3/32"	Rockwell C38-C46	-0.01" to +0.01"	Split Lock	Steel	£47.89	50
C	MPB1001	5/16"	0.322"	0.583"	0.0781"	Rockwell C38-C46	-0.01" to +0.01"	Split Lock	Steel	£47.89	50

APPROVED VENDOR -

Galvanized Steel Split Lock Washers

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Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Hardness	Thickness	Class	Type	Material	Price (inc. VAT)	Pkg. Qty.
A	B37025.150.0001	#4	1.504"	2.419"	-	3/8"	-	Split Lock	Steel	£338.82	75
B	B37025.043.0001	#4	11/25"	0.77"	-	0.109"	-	Split Lock	Steel	£314.82	2325
C	B37025.175.0001	#6	1.758"	2.679"	-	0.389"	-	Split Lock	Steel	£474.05	65
D	B37025.112.0001	#8	1.129"	1.847"	-	0.281"	-	Split Lock	Steel	£376.66	175
E	B37025.200.0001	#8	2.008"	2.936"	-	0.422"	-	Split Lock	Steel	£476.76	45
F	B37025.250.0001	#10	2.512"	3.471"	-	11/25"	-	Split Lock	Steel	£403.95	30
G	B37025.125.0001	#10	1.254"	2.036"	-	0.312"	-	Split Lock	Steel	£230.61	130
H	B37025.087.0001	#12	0.878"	1.459"	-	0.219"	-	Split Lock	Steel	£262.28	350
I	B37025.137.0001	#12	1.379"	2.219"	-	0.344"	-	Split Lock	Steel	£531.62	100
J	U37025.125.0001	1 1/4"	1.254"	2.036"	Rockwell C40-C50	0.312"	Not Applicable	Split Lock	Steel	£13.10	5
K	U37025.112.0001	1 1/8"	1.129"	1.847"	Rockwell C38-C46	0.281"	Not Applicable	Split Lock	Steel	£8.22	5
L	U37025.100.0001	1"	1.003"	1.656"	Rockwell C38-C46	1/4"	Not Applicable	Split Lock	Steel	£4.42	5
M	U37025.050.0001	1/2"	0.502"	0.869"	Rockwell C38-C46	1/8"	Not Applicable	Split Lock	Steel	£3.29	25
N	U37025.025.0001	1/4"	0.26"	0.487"	Rockwell C35	1/16"	Not Applicable	Split Lock	Steel	£1.94	100
O	U37025.075.0001	3/4"	0.753"	1.265"	Rockwell C32	3/16"	Not Applicable	Split Lock	Steel	£3.77	10
P	U37025.037.0001	3/8"	0.377"	17/25"	Rockwell C35	3/32"	Not Applicable	Split Lock	Steel	£3.72	50
Q	U37025.062.0001	5/8"	0.628"	1.073"	Rockwell C38-C46	0.156"	Not Applicable	Split Lock	Steel	£2.48	10
R	U37025.087.0001	7/8"	0.878"	1.459"	Rockwell C38-C46	0.219"	Not Applicable	Split Lock	Steel	£3.34	5

APPROVED VENDOR -

Zinc Plated Grade 2 Steel Internal and External Tooth Lock Washers

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B

C

D

E

F

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Class	Hardness	Type	Material	Price (inc. VAT)	Pkg. Qty.
A	U37590.011.0001	#4	0.123"	0.475"	0.02"	Not Applicable	Rockwell C40-C50	Internal And External Tooth Lock	Steel	£17.53	100
B	U37590.013.0001	#6	0.15"	0.51"	0.028"	Not Applicable	Rockwell C40-C50	Internal And External Tooth Lock	Steel	£11.62	100
C	U37590.016.0001	#8	0.176"	0.61"	0.034"	Not Applicable	Rockwell C40-C50	Internal And External Tooth Lock	Steel	£13.68	100
D	U37590.019.0001	#10	0.204"	0.61"	0.034"	Not Applicable	Rockwell C40-C50	Internal And External Tooth Lock	Steel	£20.41	100
E	U37590.025.0001	1/4"	0.267"	19/25"	1/25"	Not Applicable	Rockwell C40-C50	Internal And External Tooth Lock	Steel	£37.41	100
F	U37590.031.0001	5/16"	0.332"	0.9"	1/25"	Not Applicable	Rockwell C40-C50	Internal And External Tooth Lock	Steel	£48.44	100

APPROVED VENDOR -

Plain Grade A4 Stainless Steel Split Lock Washers

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D

E

F

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M

N

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R

S

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Thickness Tolerance	Class	Hardness	Color	Price (inc. VAT)	Pkg. Qty.
A	M55450.020.0001	M2	2.1 mm	4.4 mm	0.5 mm	-	Not Applicable	-	-	£2.40	50
B	M55450.025.0001	M2.5	2.6 mm	5.1 mm	0.6 mm	-	Not Applicable	-	-	£2.27	50
C	M55450.030.0001	M3	3.1 mm	6.2 mm	0.8 mm	-	Not Applicable	-	-	£4.68	50
D	LW7XX00350-100P1	M3.5	3.6 mm	6.7 mm	0.8 mm	-0.1 mm to +0.1 mm	Not Applicable	-	-	£7.25	100
E	M55450.040.0001	M4	4.1 mm	7.6 mm	0.9 mm	-	Not Applicable	-	-	£3.20	50
F	M55450.050.0001	M5	5.1 mm	9.2 mm	1.2 mm	-	Not Applicable	-	-	£5.84	50
G	M55390.050.0001	M5	5.1 mm	8.8 mm	1.6 mm	-	Not Applicable	Rockwell C38-C46	-	£4.23	50
H	M55450.060.0001	M6	6.1 mm	11.8 mm	1.6 mm	-	Not Applicable	-	-	£4.32	50
I	M55390.060.0001	M6	6.1 mm	9.9 mm	1.6 mm	-	Not Applicable	Rockwell C38-C46	-	£4.37	50
J	M55450.080.0001	M8	8.1 mm	14.8 mm	2 mm	-0.1 mm to +0.1 mm	Not Applicable	-	-	£4.14	50
K	M55390.080.0001	M8	8.1 mm	12.7 mm	2 mm	-	Not Applicable	Rockwell C38-C46	-	£3.76	50
G	M55390.100.0001	M10	10.2 mm	16 mm	2.5 mm	-	Not Applicable	Rockwell C38-C46	-	£9.01	50
L	M55450.100.0001	M10	10.2 mm	18.1 mm	2.2 mm	-	Not Applicable	-	-	£7.23	50
M	M55390.120.0001	M12	12.2 mm	18 mm	2.5 mm	-	-	-	Gray	£10.01	50
N	M55450.120.0001	M12	12.2 mm	21.1 mm	2.5 mm	-	Not Applicable	-	-	£4.95	25
O	M55450.140.0001	M14	14.2 mm	24.1 mm	3 mm	-0.15 mm to +0.15 mm	Not Applicable	-	-	£10.34	25
P	M55450.160.0001	M16	16.2 mm	27.4 mm	3.5 mm	-	Not Applicable	-	-	£4.99	10
Q	M55450.180.0001	M18	18.2 mm	29.4 mm	3.5 mm	-	Not Applicable	-	-	£6.30	10
R	M55450.200.0001	M20	20.2 mm	33.6 mm	4 mm	-	Not Applicable	-	-	£4.65	5
S	M55450.220.0001	M22	22.5 mm	35.9 mm	4 mm	-	Not Applicable	Rockwell C38-C46	-	£8.90	5
O	M55450.240.0001	M24	24.5 mm	40 mm	5 mm	-0.2 mm to +0.2 mm	Not Applicable	-	-	£10.00	5

APPROVED VENDOR -

Plain Grade A2 Stainless Steel External Tooth Lock Washers

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B

C

D

E

F

G

H

I

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M

N

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R

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Hardness	Thickness	Class	Type	Material	Price (inc. VAT)	Pkg. Qty.
A	M51456.030.0001	M3	3.2 mm	6 mm	Rockwell C40	0.4 mm	Not Applicable	External Tooth Lock	Stainless Steel	£1.87	50
B	M51460.030.0001	M3	3.2 mm	6 mm	-	0.4 mm	Not Applicable	External Tooth Lock	Stainless Steel	£2.24	50
C	M51460.040.0001	M4	4.3 mm	8 mm	-	0.5 mm	Not Applicable	External Tooth Lock	Stainless Steel	£1.07	50
D	M51456.040.0001	M4	4.3 mm	8 mm	-	0.5 mm	Not Applicable	External Tooth Lock	Stainless Steel	£1.62	50
E	M51460.051.0001	M5	5.1 mm	9 mm	-	0.5 mm	Not Applicable	External Tooth Lock	Stainless Steel	£6.29	50
F	M51460.050.0001	M5	5.3 mm	10 mm	-	0.6 mm	Not Applicable	External Tooth Lock	Stainless Steel	£1.75	50
G	M51456.050.0001	M5	5.3 mm	10 mm	-	0.6 mm	Not Applicable	External Tooth Lock	Stainless Steel	£2.40	50
H	M51460.060.0001	M6	6.4 mm	11 mm	-	0.7 mm	Not Applicable	External Tooth Lock	Stainless Steel	£5.11	50
I	M51456.060.0001	M6	6.4 mm	11 mm	-	0.7 mm	Not Applicable	External Tooth Lock	Stainless Steel	£3.04	50
E	M51460.082.0001	M8	8.2 mm	14 mm	-	0.8 mm	Not Applicable	External Tooth Lock	Stainless Steel	£4.99	50
J	M51456.080.0001	M8	8.4 mm	15 mm	-	0.8 mm	Not Applicable	External Tooth Lock	Stainless Steel	£4.96	50
K	M51460.080.0001	M8	8.4 mm	15 mm	-	0.8 mm	Not Applicable	External Tooth Lock	Stainless Steel	£4.76	50
E	M51460.100.0001	M10	10.5 mm	18 mm	-	0.9 mm to 2.7 mm	Not Applicable	External Tooth Lock	Stainless Steel	£4.48	50
L	M51456.100.0001	M10	10.5 mm	18 mm	-	0.9 mm	Not Applicable	External Tooth Lock	Stainless Steel	£5.55	50
M	M51456.120.0001	M12	13 mm	20.5 mm	-	1 mm	Not Applicable	External Tooth Lock	Stainless Steel	£2.32	25
N	M51460.120.0001	M12	13 mm	20.5 mm	Rockwell C38-C46	1 mm	Not Applicable	External Tooth Lock	Stainless Steel	£3.65	25
O	M51456.140.0001	M14	15 mm	24 mm	-	1 mm	Not Applicable	External Tooth Lock	Stainless Steel	£3.46	25
E	M51460.160.0001	M16	17 mm	26 mm	-	1.2 mm to 3.6 mm	Not Applicable	External Tooth Lock	Stainless Steel	£2.74	10
P	M51456.160.0001	M16	17 mm	26 mm	-	1.2 mm to 2.4 mm	Not Applicable	External Tooth Lock	Stainless Steel	£4.51	10
Q	M51460.200.0001	M20	21 mm	33 mm	-	1.4 mm	Not Applicable	External Tooth Lock	Stainless Steel	£4.30	5
R	M51460.240.0001	M24	25 mm	38 mm	-	1.5 mm	Not Applicable	External Tooth Lock	Stainless Steel	£4.26	5

APPROVED VENDOR -

Plain Grade A2 Stainless Steel Split Lock Washers

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B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Hardness	Thickness	Thickness Tolerance	Class	Color	Price (inc. VAT)	Pkg. Qty.
A	M51450.020.0001	M2	2.1 mm	4.4 mm	Rockwell C38-C46	0.5 mm	-	Not Applicable	-	£2.50	50
B	M51450.025.0001	M2.5	2.6 mm	5.1 mm	Rockwell C38-C46	0.6 mm	-	Not Applicable	-	£2.50	50
C	M51450.026.0001	M2.6	2.7 mm	5.2 mm	Rockwell C46	0.6 mm	-	Not Applicable	-	£2.35	50
D	M51450.030.0001	M3	3.1 mm	6.2 mm	Rockwell C46	0.8 mm	-	Not Applicable	-	£3.54	50
E	M51390.030.0001	M3	3.1 mm	5.6 mm	Rockwell C40-C50	1 mm	-	Not Applicable	-	£2.71	50
F	M51450.035.0001	M3.5	3.6 mm	6.7 mm	Rockwell C46	0.8 mm	-	Not Applicable	-	£1.10	50
G	M51450.040.0001	M4	4.1 mm	7.6 mm	Rockwell C35	0.9 mm	-	Not Applicable	-	£4.01	50
H	M51390.040.0001	M4	4.1 mm	7 mm	Rockwell C40-C50	1.2 mm	-	Not Applicable	-	£2.44	50
I	M51450.050.0001	M5	5.1 mm	9.2 mm	Rockwell C38-C46	1.2 mm	-	Not Applicable	-	£3.64	50
J	M51390.050.0001	M5	5.1 mm	8.8 mm	Rockwell C40-C50	1.6 mm	-	Not Applicable	-	£3.32	50
K	M51390.060.0001	M6	6.1 mm	9.9 mm	Rockwell C40-C50	1.6 mm	-	Not Applicable	-	£3.09	50
L	M51450.060.0001	M6	6.1 mm	11.8 mm	Rockwell C35	1.6 mm	-0.1 mm to +0.1 mm	Not Applicable	-	£5.11	50
M	M51390.080.0001	M8	8.1 mm	12.7 mm	Rockwell C40-C50	2 mm	-	Not Applicable	-	£3.89	50
N	M51450.080.0001	M8	8.1 mm	14.8 mm	Rockwell C35	2 mm	-0.1 mm to +0.1 mm	Not Applicable	-	£4.52	50
O	M51390.100.0001	M10	10.2 mm	16 mm	Rockwell C40-C50	2.5 mm	-	Not Applicable	-	£5.44	50
P	M51450.100.0001	M10	10.2 mm	18.1 mm	Rockwell C35	2.2 mm	-0.15 mm to +0.15 mm	Not Applicable	-	£6.41	50
Q	M51390.120.0001	M12	12.2 mm	18 mm	-	2.5 mm	-	Not Applicable	-	£4.14	25
R	M51450.120.0001	M12	12.2 mm	21.1 mm	-	2.5 mm	-0.15 mm to +0.15 mm	Not Applicable	-	£5.50	25
S	M51450.140.0001	M14	14.2 mm	24.1 mm	Rockwell C35	3 mm	-0.15 mm to +0.15 mm	Not Applicable	-	£7.08	25
T	M51390.160.0001	M16	16.2 mm	24.4 mm	-	3.5 mm	-	-	Gray	£4.09	10
U	M51450.160.0001	M16	16.2 mm	27.4 mm	-	3.5 mm	-0.2 mm to +0.2 mm	Not Applicable	-	£4.15	10
V	M51450.180.0001	M18	18.2 mm	29.4 mm	Rockwell C35	3.5 mm	-	Not Applicable	-	£4.30	10
W	M51450.200.0001	M20	20.2 mm	33.6 mm	-	4 mm	-	Not Applicable	-	£3.55	5
X	M51450.220.0001	M22	22.5 mm	35.9 mm	Rockwell C38-C46	4 mm	-	Not Applicable	-	£4.28	5
Y	M51450.240.0001	M24	24.5 mm	40 mm	Rockwell C35	5 mm	-	Not Applicable	-	£6.07	5

APPROVED VENDOR -

Zinc Plated Grade 2 Steel Internal Tooth Lock Washers

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B

C

D

E

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Hardness	Thickness	Thickness Tolerance	Class	Price (inc. VAT)	Pkg. Qty.
A	U37480.100.0001	1"	1.019"	1.59"	Rockwell C38-C46	0.059"	0.059" to 0.067"	Not Applicable	£6.79	5
B	U37480.025.0001	1/4"	0.267"	0.478"	Rockwell C40-C50	0.028"	0.023" to 0.028"	Not Applicable	£5.77	100
C	U37480.087.0001	7/8"	0.894"	1.364"	Rockwell C38-C46	0.052"	0.052" to 0.06"	Not Applicable	£5.96	5
D	U37480.043.0001	7/16"	0.448"	0.74"	Rockwell C40-C50	0.032"	0.032" to 0.04"	Not Applicable	£5.28	25
E	U37480.056.0001	9/16"	0.576"	0.957"	Rockwell C38-C46	0.037"	0.037" to 0.045"	Not Applicable	£10.14	25

APPROVED VENDOR -

Plain Phosphor Bronze External Tooth Lock Washers

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B

C

D

E

F

G

H

I

J

K

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Hardness	Thickness	Thickness Tolerance	Class	Price (inc. VAT)	Pkg. Qty.
A	B50450.011.0001	#2	0.115"	0.245"	-	0.012"	-	-	£7,499.18	90000
B	B50450.013.0001	#4	0.141"	0.305"	-	0.016"	-	-	£7,554.77	90000
C	U50450.011.0001	#4	0.123"	0.26"	Rockwell B90	0.018"	0.012" to 0.018"	Not Applicable	£6.96	100
A	B50450.037.0001	#6	0.384"	0.67"	-	0.032"	-	-	£7,249.32	14450
D	U50450.013.0001	#6	0.15"	8/25"	Rockwell B90	0.022"	0.016" to 0.022"	Not Applicable	£5.10	100
E	B50450.016.0001	#6	0.168"	0.365"	-	0.018"	-	-	£8,861.25	50000
A	B50450.019.0001	#8	0.195"	0.395"	-	0.018"	-	-	£10,448.24	50000
F	U50450.016.0001	#8	0.176"	0.381"	Rockwell B90	0.023"	0.018" to 0.023"	Not Applicable	£13.18	100
G	U50450.019.0001	#10	0.204"	0.41"	Rockwell B90	0.024"	0.018" to 0.024"	Not Applicable	£19.48	100
H	B50450.025.0001	#10	0.256"	0.494"	-	0.023"	-	-	£7,617.86	32200
A	B50450.050.0001	#10	0.513"	22/25"	-	0.037"	-	-	£10,611.21	6750
I	U50450.050.0001	1/2"	0.53"	0.9"	Rockwell B90	0.045"	0.037" to 0.045"	Not Applicable	£28.72	25
J	U50450.025.0001	1/4"	0.267"	0.51"	Rockwell B90	0.028"	0.023" to 0.028"	Not Applicable	£16.75	100
K	U50450.037.0001	3/8"	0.384"	0.67"	Rockwell C50	0.032"	-	Not Applicable	£23.41	50
K	U50450.031.0001	5/16"	8/25"	0.588"	Rockwell C50	0.028"	-	Not Applicable	£24.45	100

APPROVED VENDOR -

Plain Grade 410 Stainless Steel Internal Tooth Lock Washers

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E

F

G

H

I

J

K

L

M

N

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Thickness Tolerance	Class	Hardness	Price (inc. VAT)	Pkg. Qty.
A	U53462.008.0001	#2	0.089"	0.172"	0.01"	-	Not Applicable	Rockwell C40	£12.50	50
B	U53462.009.0001	#3	0.102"	0.215"	0.01"	-	Not Applicable	Rockwell C40	£2.88	50
C	U53462.011.0001	#4	0.115"	0.245"	0.012"	0.012" to 0.018"	Not Applicable	Rockwell C40	£2.41	50
D	U53462.013.0001	#6	0.141"	0.275"	0.016"	0.016" to 0.022"	Not Applicable	Rockwell C40	£4.83	50
E	U53462.016.0001	#8	0.168"	0.325"	0.018"	0.018" to 0.023"	Not Applicable	Rockwell C40	£7.37	50
F	U53462.019.0001	#10	0.195"	0.365"	0.018"	0.018" to 0.024"	Not Applicable	Rockwell C40	£3.08	50
G	U53462.021.0001	#12	0.221"	0.394"	0.02"	0.02" to 0.027"	Not Applicable	Rockwell C40	£3.60	50
H	U53462.050.0001	1/2"	0.512"	0.867"	0.037"	-0.004" to +0.004"	Not Applicable	Rockwell C40	£2.89	10
I	U53462.025.0001	1/4"	0.256"	0.46"	0.023"	-	Not Applicable	Rockwell C40	£4.22	50
J	U53462.075.0001	3/4"	0.769"	1.22"	0.047"	-0.004" to +0.004"	Not Applicable	Rockwell C40	£3.88	5
K	U53462.037.0001	3/8"	0.384"	0.67"	0.032"	-	Not Applicable	Rockwell C40	£10.91	50
L	U53462.062.0001	5/8"	16/25"	1.045"	0.042"	-0.004" to +0.004"	Not Applicable	Rockwell C40	£5.86	10
M	U53462.031.0001	5/16"	8/25"	0.594"	0.028"	-	Not Applicable	Rockwell C40	£8.01	50
N	U53462.043.0001	7/16"	0.448"	0.74"	0.032"	-	Not Applicable	Rockwell C40	£11.38	25

GRAINGER -

Split Lock Washer, 1.151 In O.D., 0.628 In I.D., Blk Oxide, Not Gr., Steel, 25 Pk

Model	Item	Price (inc. VAT)	Pkg. Qty.
LWXIS062USA-025BX	CQ2KAQ	£25.30	25

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Split Lock Washer, 1.151 In O.D., 0.628 In I.D., Blk Oxide, Not Gr., Steel, 25 Pk

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Split Lock Washer, 1.151 In O.D., 0.628 In I.D., Blk Oxide, Not Gr., Steel, 25 Pk

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