Left Hand Inserts | Raptor Supplies United Kingdom
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Left Hand Inserts

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Left-hand inserts are ideal for repairing stripped threads or creating new threads in a drilled hole to install left-hand threaded fasteners. Raptor Supplies offers these left-hand inserts...Read more

CHRISLYNN -

Precision Standard Industrial Kits, Left Handed, Imperial

CHRISLYNN 82135LHA
CHRISLYNN 82124LHB
CHRISLYNN 82126LHC
CHRISLYNN 82117LHD
StyleModelThread SizeDrill SizePrice (inc. VAT)
A82135LH1-81 1/32"£849.31
A82137LH1-141 1/64"£849.31
B82124LH1/2-1317/32"£161.91
C82126LH1/2-2033/64"£330.98
B82116LH1/4-2017/64"£129.30
D82117LH1/4-2817/64"£263.90
C82131LH3/4-1025/32"£484.16
C82132LH3/4-1649/64"£484.16
B82120LH3/8-1625/64"£131.73
D82121LH3/8-2425/64"£267.58
C82129LH5/8-1121/32"£315.67
C82130LH5/8-1841/64"£338.37
B82118LH5/16-1821/64"£131.73
D82119LH5/16-2421/64"£267.58
A82133LH7/8-929/32"£570.00
A82134LH7/8-1457/64"£570.00
B82122LH7/16-1429/64"£161.91
C82123LH7/16-2029/64"£330.98
CHRISLYNN -

Precision Inserts, Left Handed, Imperial

CHRISLYNN 83135LHA
StyleModelThread SizeInsert LengthDrill SizePrice (inc. VAT)
A83135LH1-81.5"1 1/32"£109.88
A83137LH1-141.5"1 1/64"£109.88
A83124LH1/2-130.75"17/32"£96.67
A83126LH1/2-200.75"33/64"£90.66
A83116LH1/4-200.375"17/64"£136.17
A83117LH1/4-280.375"17/64"£136.17
A83131LH3/4-101.125"25/32"£68.23
A83132LH3/4-161.125"49/64"£68.23
A83120LH3/8-160.562"25/64"£136.17
A83121LH3/8-240.562"25/64"£136.17
A83129LH5/8-110.938"21/32"£59.11
A83130LH5/8-180.938"41/64"£56.46
A83118LH5/16-180.469"21/64"£136.17
A83119LH5/16-240.469"21/64"£128.97
A83133LH7/8-91.312"29/32"£82.79
A83134LH7/8-141.312"57/64"£77.17
A83122LH7/16-140.656"29/64"£96.67
A83123LH7/16-200.656"29/64"£96.67
CHRISLYNN -

Precision Taps, Left Handed, Imperial

CHRISLYNN 86135LHA
StyleModelThread SizeDrill Size
A86135LH1-81 1/32"
RFQ
A86137LH1-141 1/64"
RFQ
A86124LH1/2-1317/32"
RFQ
A86126LH1/2-2033/64"
RFQ
A86116LH1/4-2017/64"
RFQ
A86117LH1/4-2817/64"
RFQ
A86131LH3/4-1025/32"
RFQ
A86132LH3/4-1649/64"
RFQ
A86120LH3/8-1625/64"
RFQ
A86121LH3/8-2425/64"
RFQ
A86129LH5/8-1121/32"
RFQ
A86130LH5/8-1841/64"
RFQ
A86118LH5/16-1821/64"
RFQ
A86119LH5/16-2421/64"
RFQ
A86133LH7/8-929/32"
RFQ
A86134LH7/8-1457/64"
RFQ
A86122LH7/16-1429/64"
RFQ
A86123LH7/16-2029/64"
RFQ
CHRISLYNN -

Precision Standard Industrial Kits, Left Handed, Metric

CHRISLYNN 82157LHA
CHRISLYNN 82169LHB
CHRISLYNN 82171LHC
CHRISLYNN 82179LHD
StyleModelThread SizeDrill SizePrice (inc. VAT)
A82157LHM6 x 11/4"£244.29
A82159LHM8 x 121/64"£308.40
A82160LHM8 x 1.2521/64"£283.13
A82165LHM10 x 1.513/32"£315.93
A82164LHM10 x 1.2513/32"£287.53
B82169LHM12 x 1.2531/64"£368.57
C82171LHM12 x 1.7531/64"£177.20
B82172LHM14 x 1.59/16"£475.89
B82173LHM14 x 237/64"£475.89
B82174LHM16 x 1.521/32"£476.30
B82175LHM16 x 221/32"£477.97
B82176LHM18 x 1.523/32"£543.07
B82178LHM18 x 2.547/64"£543.07
D82179LHM20 x 1.513/16"£558.81
B82181LHM20 x 2.513/16"£558.81
D82182LHM22 x 1.557/64"£663.09
D82186LHM24 x 231/32"£868.16
D82187LHM24 x 331/32"£868.16
CHRISLYNN -

Precision Inserts, Left Handed, Metric

CHRISLYNN 83157LHA
StyleModelThread SizeInsert LengthDrill SizePrice (inc. VAT)
A83157LHM6 x 19mm1/4"£136.17
A83159LHM8 x 112mm21/64"£136.17
A83160LHM8 x 1.2512mm21/64"£136.17
A83165LHM10 x 1.515mm13/32"£143.42
A83164LHM10 x 1.2515mm13/32"£135.99
A83169LHM12 x 1.2518mm31/64"£163.29
A83171LHM12 x 1.7518mm31/64"£163.29
A83172LHM14 x 1.521mm9/16"£155.41
A83173LHM14 x 221mm37/64"£163.29
A83174LHM16 x 1.524mm21/32"£110.10
A83175LHM16 x 224mm21/32"£110.10
A83176LHM18 x 1.527mm23/32"£123.87
A83178LHM18 x 2.527mm47/64"£123.87
A83179LHM20 x 1.530mm13/16"£84.44
A83181LHM20 x 2.530mm13/16"£84.44
A83182LHM22 x 1.533mm57/64"£96.67
A83186LHM24 x 236mm31/32"£109.88
A83187LHM24 x 336mm31/32"£109.88
CHRISLYNN -

Precision Taps, Left Handed, Metric

CHRISLYNN 86157LHA
StyleModelThread SizeDrill Size
A86157LHM6 x 11/4"
RFQ
A86159LHM8 x 121/64"
RFQ
A86160LHM8 x 1.2521/64"
RFQ
A86165LHM10 x 1.513/32"
RFQ
A86164LHM10 x 1.2513/32"
RFQ
A86169LHM12 x 1.2531/64"
RFQ
A86171LHM12 x 1.7531/64"
RFQ
A86172LHM14 x 1.59/16"
RFQ
A86173LHM14 x 237/64"
RFQ
A86174LHM16 x 1.521/32"
RFQ
A86175LHM16 x 221/32"
RFQ
A86176LHM18 x 1.523/32"
RFQ
A86178LHM18 x 2.547/64"
RFQ
A86179LHM20 x 1.513/16"
RFQ
A86181LHM20 x 2.513/16"
RFQ
A86182LHM22 x 1.557/64"
RFQ
A86186LHM24 x 231/32"
RFQ
A86187LHM24 x 331/32"
RFQ

Left Hand Inserts

Left-hand inserts are ideal for repairing stripped threads or creating new threads in a drilled hole to install left-hand threaded fasteners. Raptor Supplies offers these left-hand inserts from Chrislynn. They provide more strength, versatility & resilience than the fasteners installed inside traditional threaded holes. They have left-handed threads (also called reverse threads) for specialised applications like automotive, heating & plumbing pipes and gas supply valves, where right-hand threaded fasteners would loosen due to pressure.

Frequently Asked Questions

Why are left-hand inserts larger in diameter than the tapped hole before installation?

Left-hand inserts feature a slightly larger diameter compared to the tapped hole diameter before installation, as the leading coil's diameter decreases when the installation tool applies torque to the insert's prong / tang. After these threaded inserts get installed, they act as a spring to expand outward onto the material and provide strong anchoring.

Why do these left-hand inserts have open ends?

These inserts have an open end for allowing the installation of fasteners with a longer length than them.

What accessories are compatible with these left-hand inserts?

Installation of these left-hand inserts requires a drill bit, a tapping tool, an installation tool and a prong break-off tool. Selected models come in a kit containing all these tools.

How to determine the length of the left-hand insert required?

  • Length of a helical left-hand insert should be at least as long as the desired screw diameter. Users may choose longer inserts for increased strength.
  • The exact insert length can vary depending upon the application & the material in which the insert is being installed. Hard materials like steel do not need long inserts. For soft materials like aluminium, a longer insert may be preferable.

How to install a helical left-hand insert?

  • Drill a hole according to the length of the insert / screw / bolt to be installed.
  • Thread the drilled hole using a tapping tool.
  • Thread the insert into the tapped hole using an installation tool by properly gripping the insert's prong.
  • Wind the insert inside the hole up to a quarter to half turn below the hole's surface.
  • Remove the prong using a prong break-off tool or punch to allow full passage of the fastener into the insert.

Can thread inserts be removed once installed?

Yes, some thread inserts can be removed using removal tools that attach to them & unwind them in the direction opposite to that used during installation.

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