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

StyleModelMPN
A86116LH86116LH
RFQ
A86117LH86117LH
RFQ
A86118LH86118LH
RFQ
A86119LH86119LH
RFQ
A86120LH86120LH
RFQ
A86121LH86121LH
RFQ
A86122LH86122LH
RFQ
A86123LH86123LH
RFQ
A86124LH86124LH
RFQ
A86126LH86126LH
RFQ
A86129LH86129LH
RFQ
A86130LH86130LH
RFQ
A86131LH86131LH
RFQ
A86132LH86132LH
RFQ
A86133LH86133LH
RFQ
A86134LH86134LH
RFQ
A86135LH86135LH
RFQ
A86137LH86137LH
RFQ
A86157LH86157LH
RFQ
A86159LH86159LH
RFQ
A86160LH86160LH
RFQ
A86164LH86164LH
RFQ
A86165LH86165LH
RFQ
A86169LH86169LH
RFQ
A86171LH86171LH
RFQ
CHRISLYNN -

Stainless Steel Left Hand Insert Kits

StyleModelMPNPrice (inc. VAT)
A82117LH82117LH£171.31
A82119LH82119LH£173.71
A82121LH82121LH£155.47
B82123LH82123LH£214.88
B82126LH82126LH£214.88
B82129LH82129LH£204.92
B82130LH82130LH£196.61
B82131LH82131LH£303.14
B82132LH82132LH£314.31
C82133LH82133LH£370.03
C82134LH82134LH£370.03
C82135LH82135LH£551.37
C82137LH82137LH£551.37
A82157LH82157LH£174.92
A82159LH82159LH£200.20
A82160LH82160LH£184.70
A82164LH82164LH£188.21
A82165LH82165LH£188.21
B82169LH82169LH£219.55
D82171LH82171LH-
RFQ
B82172LH82172LH£308.94
B82173LH82173LH£283.45
B82174LH82174LH£311.41
B82175LH82175LH£311.41
B82176LH82176LH£352.56
StyleModelMPNPrice (inc. VAT)Pkg. Qty.
A83116LH83116LH£150.876
A83117LH83117LH£151.166
A83118LH83118LH£150.876
A83119LH83119LH£130.896
A83120LH83120LH£151.166
A83121LH83121LH£151.166
A83122LH83122LH£106.024
A83123LH83123LH£106.234
A83124LH83124LH£106.234
A83126LH83126LH£92.854
A83129LH83129LH£61.062
A83130LH83130LH£61.062
A83131LH83131LH£74.052
A83132LH83132LH£74.212
A83133LH83133LH£90.562
A83134LH83134LH£79.032
A83135LH83135LH£121.212
A83137LH83137LH£120.972
A83157LH83157LH£150.876
A83159LH83159LH£151.166
A83160LH83160LH£138.196
A83164LH83164LH£137.996
A83165LH83165LH£159.476
A83169LH83169LH£181.916
A83171LH83171LH£182.276
CHRISLYNN -

Imperial Precision Standard Industrial Kit

Left-hand inserts are ideal for repairing stripped threads or creating new threads in a drilled hole to install left-hand threaded fasteners. They provide more strength, versatility & resilience than the fasteners installed inside traditional threaded holes. These inserts 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.
These inserts have widely spaced threads to start tightening easily.

StyleModelMPN
A82116LH82116LH
RFQ
A82118LH82118LH
RFQ
A82120LH82120LH
RFQ
A82122LH82122LH
RFQ
A82124LH82124LH
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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