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 from Read More

CHRISLYNN -

Precision Standard Industrial Kits, Left Handed, Imperial

StyleModelThread SizeDrill SizePrice (inc. GST)
A82135LH1-81 1/32" SGD 1319.85
A82137LH1-141 1/64" SGD 1319.85
B82124LH1/2-1317/32" SGD 251.61
C82126LH1/2-2033/64" SGD 514.35
B82116LH1/4-2017/64" SGD 200.94
D82117LH1/4-2817/64" SGD 410.11
C82131LH3/4-1025/32" SGD 752.39
C82132LH3/4-1649/64" SGD 752.39
B82120LH3/8-1625/64" SGD 204.70
D82121LH3/8-2425/64" SGD 415.82
C82129LH5/8-1121/32" SGD 490.56
C82130LH5/8-1841/64" SGD 525.83
B82118LH5/16-1821/64" SGD 204.70
D82119LH5/16-2421/64" SGD 415.82
A82133LH7/8-929/32" SGD 885.79
A82134LH7/8-1457/64" SGD 885.79
B82122LH7/16-1429/64" SGD 251.61
C82123LH7/16-2029/64" SGD 514.35
StyleModelThread SizeInsert LengthDrill SizePrice (inc. GST)
A83135LH1-81.5"1 1/32" SGD 170.76
A83137LH1-141.5"1 1/64" SGD 170.76
A83124LH1/2-130.75"17/32" SGD 150.23
A83126LH1/2-200.75"33/64" SGD 140.89
A83116LH1/4-200.375"17/64" SGD 211.60
A83117LH1/4-280.375"17/64" SGD 211.60
A83131LH3/4-101.125"25/32" SGD 106.02
A83132LH3/4-161.125"49/64" SGD 106.02
A83120LH3/8-160.562"25/64" SGD 211.60
A83121LH3/8-240.562"25/64" SGD 211.60
A83129LH5/8-110.938"21/32" SGD 91.86
A83130LH5/8-180.938"41/64" SGD 87.74
A83118LH5/16-180.469"21/64" SGD 211.60
A83119LH5/16-240.469"21/64" SGD 200.42
A83133LH7/8-91.312"29/32" SGD 128.66
A83134LH7/8-141.312"57/64" SGD 119.92
A83122LH7/16-140.656"29/64" SGD 150.23
A83123LH7/16-200.656"29/64" SGD 150.23
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

StyleModelThread SizeDrill SizePrice (inc. GST)
A82157LHM6 x 11/4" SGD 379.64
A82159LHM8 x 121/64" SGD 479.26
A82160LHM8 x 1.2521/64" SGD 439.98
A82165LHM10 x 1.513/32" SGD 490.96
A82164LHM10 x 1.2513/32" SGD 446.83
B82169LHM12 x 1.2531/64" SGD 572.76
C82171LHM12 x 1.7531/64" SGD 275.36
B82172LHM14 x 1.59/16" SGD 739.54
B82173LHM14 x 237/64" SGD 739.54
B82174LHM16 x 1.521/32" SGD 740.18
B82175LHM16 x 221/32" SGD 742.77
B82176LHM18 x 1.523/32" SGD 843.94
B82178LHM18 x 2.547/64" SGD 843.94
D82179LHM20 x 1.513/16" SGD 868.39
B82181LHM20 x 2.513/16" SGD 868.39
D82182LHM22 x 1.557/64" SGD 1030.45
D82186LHM24 x 231/32" SGD 1349.14
D82187LHM24 x 331/32" SGD 1349.14
StyleModelThread SizeInsert LengthDrill SizePrice (inc. GST)
A83157LHM6 x 19mm1/4" SGD 211.60
A83159LHM8 x 112mm21/64" SGD 211.60
A83160LHM8 x 1.2512mm21/64" SGD 211.60
A83165LHM10 x 1.515mm13/32" SGD 222.88
A83164LHM10 x 1.2515mm13/32" SGD 211.33
A83169LHM12 x 1.2518mm31/64" SGD 253.76
A83171LHM12 x 1.7518mm31/64" SGD 253.76
A83172LHM14 x 1.521mm9/16" SGD 241.51
A83173LHM14 x 221mm37/64" SGD 253.76
A83174LHM16 x 1.524mm21/32" SGD 171.09
A83175LHM16 x 224mm21/32" SGD 171.09
A83176LHM18 x 1.527mm23/32" SGD 192.49
A83178LHM18 x 2.527mm47/64" SGD 192.49
A83179LHM20 x 1.530mm13/16" SGD 131.21
A83181LHM20 x 2.530mm13/16" SGD 131.21
A83182LHM22 x 1.533mm57/64" SGD 150.23
A83186LHM24 x 236mm31/32" SGD 170.76
A83187LHM24 x 336mm31/32" SGD 170.76
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.

Features

  • Left-hand inserts create strong internal threading on various materials like metals, polymers, wood & composites.
  • They provide a strong, leak-tight connection to the fastener while preventing wear or over-torque.
  • The left-hand threads create incompatibility or a safety / defence factor for preventing gradual loosening due to torque or pressure.
  • These left-hand helical threaded inserts are equipped with a tang / prong at the end for ease of installation.
  • They are available in Imperial & Metric sizes.
  • The standard length of left-handed precision inserts from Chrislynn is 1.5 times their diameter.
  • These free-running inserts are made of 304 stainless steel for outdoor operations.

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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