Helical Thread Repair Inserts

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Helical thread repair inserts are designed to repair worn threads inside tapped holes. They provide reliable threading in metals, composites, wood or similar materials. Raptor Supplies offers a wide... Read More

StyleModelThread SizeInsert LengthDrill SizePrice (inc. GST)
A831441 1/2-62.25"1 17/32" SGD 59.38
A831401 1/4-71.875"1 9/32" SGD 48.11
A831381 1/8-71.688"1 5/32" SGD 49.53
A831421 3/8-62.062"1 13/32" SGD 69.37
A831351-81.5"1 1/32" SGD 36.02
A831241/2-130.75"17/32" SGD 33.50
A831161/4-200.375"17/64" SGD 33.06
A831002-560.129"3/32" SGD 22.23
A831023-480.148"#36 SGD 25.46
A831313/4-101.125"25/32" SGD 42.66
A831203/8-160.562"25/64" SGD 34.62
A831044-400.168"#31 SGD 20.69
A831065-400.188"#29 SGD 23.21
A831295/8-110.938"21/32" SGD 42.66
A831185/16-180.469"21/64" SGD 156.18
A831086-320.207"#25 SGD 21.24
A831337/8-91.312"29/32" SGD 33.20
A831227/16-140.656"29/64" SGD 33.06
A831108-320.246"11/64" SGD 29.83
A831279/16-120.844"19/32" SGD 45.73
A8311210-240.285"13/64" SGD 34.05
A8311412-240.324"15/64" SGD 35.74
StyleModelPrice (inc. GST)
A87926M SGD 1179.14
A87926A SGD 1111.61
StyleModelInsert LengthDrill SizeExternal Thread SizeInternal Thread SizePrice (inc. GST)
A9450-36.5mm#7M6 x 1M3 x 0.5 SGD 26.93
A9450-47.5mmIM8 x 1.25M4 x 0.7 SGD 24.18
A9450-57.5mmIM8 x 1.25M5 x 0.8 SGD 24.57
A9450-610.5mmRM10 x 1.5M6 x 1 SGD 24.99
A9450-812.5mmZM12 x 1.75M8 x 1.25 SGD 25.46
A9450-1017mm35/64"M16 x 2M10 x 1.5 SGD 27.67
A9450-1217mm35/64"M16 x 2M12 x 1.75 SGD 28.41
A9450-1620mm53/64"M24 x 3M16 x 2 SGD 29.75
A9450-2030mm1 5/16"M36 x 4M20 x 2.5 SGD 26.01
StyleModelThread SizeInsert LengthDrill SizePrice (inc. GST)
A83150M2 x 0.43mm#45 SGD 64.86
A83151M2.2 x 0.453.3mm#42 SGD 24.47
A83152M2.5 x 0.453.8mm#37 SGD 19.00
A83153M3 x 0.54.5mm1/8" SGD 18.43
A83154M3.5 x 0.65.3mm#27 SGD 21.68
A83155M4 x 0.76mm11/64" SGD 29.60
A83156M5 x 0.87.5mm13/64" SGD 29.60
A83157M6 x 19mm1/4" SGD 30.82
A83158M7 x 110.5mm9/32" SGD 36.29
A83159M8 x 112mm21/64" SGD 32.08
A83160M8 x 1.2512mm21/64" SGD 31.07
A83161M9 x 113.5mm3/8" SGD 34.82
A83162M9 x 1.2513.5mm3/8" SGD 35.03
A83163M10 x 115mm13/32" SGD 34.82
A83165M10 x 1.515mm13/32" SGD 35.15
A83164M10 x 1.2515mm13/32" SGD 34.82
A83166M11 x 116.5mm7/16" SGD 31.94
A83168M11 x 1.516.55m29/64" SGD 33.54
A83167M11 x 1.2516.5mm29/64" SGD 31.94
A83146M12 x 118mm31/64" SGD 32.79
A83170M12 x 1.518mm31/64" SGD 32.79
A83169M12 x 1.2518mm31/64" SGD 32.79
A83171M12 x 1.7518mm31/64" SGD 31.55
A83172M14 x 1.521mm9/16" SGD 37.48
A83147M14 x 1.2521mm9/16" SGD 37.48
StyleModelInsert LengthDrill SizeExternal Thread SizeInternal Thread SizePrice (inc. GST)
A9453-36.5mm#7M6 x 1M3 x 0.5 SGD 25.38
A9453-47.5mmIM8 x 1.25M4 x 0.7 SGD 26.31
A9453-57.5mmIM8 x 1.25M5 x 0.8 SGD 26.80
A9453-610.5mmRM10 x 1.5M6 x 1 SGD 27.19
A9453-812.5mmZM12 x 1.75M8 x 1.25 SGD 28.14
A9453-1017mm35/64"M16 x 2M10 x 1.5 SGD 30.48
A9453-1217mm35/64"M16 x 2M12 x 1.75 SGD 31.80
A9453-1620mm53/64"M24 x 3M16 x 2 SGD 36.45
StyleModelInsert LengthDrill SizeExternal Thread SizeInternal Thread SizePrice (inc. GST)
A9650-60.406"5/16"3/8-16M6 x 1 SGD 23.19
A9650-80.484"27/64"1/2-13M8 x 1.25 SGD 23.73
A9650-10F0.515"31/64"9/16-12M10 x 1.25 SGD 23.98
A9650-100.515"31/64"9/16-12M10 x 1.5 SGD 23.98
A9650-120.656"21/32"3/4-10M12 x 1.75 SGD 24.85
A9650-140.687"49/64"7/8-9M14 x 2 SGD 26.17
A9650-160.781"7/8"1-8M16 x 2 SGD 27.61
StyleModelInsert LengthDrill SizeExternal Thread SizeInternal Thread SizePrice (inc. GST)
A9653-60.406"5/16"3/8-16M6 x 1 SGD 27.08
A9653-80.484"27/64"1/2-13M8 x 1.25 SGD 27.98
A9653-100.515"31/64"9/16-12M10 x 1.5 SGD 28.97
A9653-10F0.515"31/64"9/16-12M10 x 1.25 SGD 28.97
A9653-120.656"21/32"3/4-10M12 x 1.75 SGD 32.28
A9653-140.687"49/64"7/8-9M14 x 2 SGD 34.90
A9653-160.781"7/8"1-8M16 x 2 SGD 36.45
StyleModelInsert LengthDrill SizeExternal Thread SizeInternal Thread SizePrice (inc. GST)
A9550-0066.5mm#7M6 x 16-32 SGD 23.98
A9550-0087.5mmIM8 x 1.258-32 SGD 24.18
A9550-10247.5mmIM8 x 1.2510-24 SGD 24.99
A9550-10327.5mmIM8 x 1.2510-32 SGD 24.99
A9550-142010.5mmRM10 x 1.51/4-20 SGD 25.46
A9550-512.5mmZM12 x 1.755/16-18 SGD 25.46
A9550-617mm35/64"M16 x 23/8-16 SGD 26.80
A9550-817mm35/64"M16 x 21/2-13 SGD 27.13
POWERCOIL -

Helical Inserts

StyleModelDrill SizeFree Coil Dia.LengthSizeTap SizesThread TypeTypePrice (inc. GST)
A3532-6GX1.5DSL#250.193"0.207"6-326-32UNCScrew Locking SGD 12.25
B3532-6GX1.0D#250.193"0.138"6-326-32UNCFree Running SGD 6.98
C3532-6GX1.0DSL#250.193"0.138"6-326-32UNCScrew Locking SGD 12.21
D3532-6GX2.0DSL#250.193"0.276"6-326-32UNCScrew Locking SGD 9.75
E3532-6GX1.5D#250.193"0.207"6-326-32UNCFree Running SGD 9.05
F3532-6GX2.0D#250.193"0.276"6-326-32UNCFree Running SGD 12.11
G3532-5GX1.5D#290.173"0.188"5-405-40UNCFree Running SGD 5.98
H3532-5GX2.0D#290.173"0.25"5-405-40UNCFree Running SGD 11.51
I3532-5GX1.0D#290.173"0.125"5-405-40UNCFree Running SGD 5.65
J3532-5GX1.0DSL#290.173"0.125"5-405-40UNCScrew Locking SGD 9.85
K3532-5GX2.0DSL#290.173"0.25"5-405-40UNCScrew Locking SGD 15.13
L3532-5GX1.5DSL#290.173"0.188"5-405-40UNCScrew Locking SGD 9.75
M3532-4GX2.0D#310.159"0.224"4-404-40UNCFree Running SGD 12.11
N3532-4GX1.0DSL#310.159"0.112"4-404-40UNCScrew Locking SGD 10.47
O3532-4GX1.5DSL#310.159"0.168"4-404-40UNCScrew Locking SGD 8.15
M3532-4GX1.5D#310.159"0.168"4-404-40UNCFree Running SGD 9.21
P3532-4GX2.0DSL#310.159"0.224"4-404-40UNCScrew Locking SGD 14.53
M3532-4GX1.0D#310.159"0.112"4-404-40UNCFree Running SGD 9.27
Q3532-2GX1.0DSL#410.119"0.086"2-562-56UNCScrew Locking SGD 12.17
R3532-2GX1.5DSL#410.119"0.129"2-562-56UNCScrew Locking SGD 9.27
M3532-2GX1.0D#410.119"0.086"2-562-56UNCFree Running SGD 7.12
M3532-2GX1.5D#410.119"0.129"2-562-56UNCFree Running SGD 11.61
S3535-1X1.0D1-1/64"1.199"1"1-141-14UNFFree Running SGD 9.75
T3535-1X1.0DSL1-1/64"1.199"1"1-141-14UNFScrew Locking SGD 7.55
U3534-1X1.5D1-1/64"1.199"1.5"1-121-12UNFFree Running SGD 12.56
POWERCOIL -

Tangless Inserts

StyleModelDrill SizeFree Coil Dia.LengthSizeTap SizesThread TypeTypePrice (inc. GST)
A3532-6GX1.0DTL#250.193"0.138"6-326-32UNCFree Running-
RFQ
B3532-6GX1.5DTL#250.193"0.207"6-326-32UNCFree Running-
RFQ
C3532-6GX2.0ODTL#250.193"0.276"6-326-32UNCFree Running-
RFQ
D3532-6GX1.0DSLTL#250.193"0.138"6-326-32UNCScrew Locking-
RFQ
E3532-6GX1.5DSLTL#250.193"0.207"6-326-32UNCScrew Locking-
RFQ
F3532-4GX2.0DSLTL#310.159"0.224"4-404-40UNCScrew Locking-
RFQ
G3532-4GX1.5DSLTL#310.159"0.168"4-404-40UNCScrew Locking SGD 293.17
H3532-4GX1.0DTL#310.159"0.112"4-404-40UNCFree Running-
RFQ
I3532-4GX1.5DTL#310.159"0.168"4-404-40UNCFree Running SGD 159.91
J3532-4GX2.0DTL#310.159"0.224"4-404-40UNCFree Running-
RFQ
K3532-4GX1.0DSLTL#310.159"0.112"4-404-40UNCScrew Locking SGD 283.13
L3532-2GX1.5DTL#410.119"0.129"2-562-56UNCFree Running-
RFQ
M3532-2GX2.0DSLTL#410.119"0.172"2-562-56UNCScrew Locking-
RFQ
N3532-2GX1.5DSLTL#410.119"0.129"2-562-56UNCScrew Locking-
RFQ
O3532-2GX1.0DSLTL#410.119"0.086"2-562-56UNCScrew Locking-
RFQ
P3532-2GX1.0DTL#410.119"0.086"2-562-56UNCFree Running-
RFQ
Q3532-2GX2.0DTL#410.119"0.172"2-562-56UNCFree Running-
RFQ
R3532-8GX2.0DSLTL11/64"0.220"0.328"8-328-32UNCScrew Locking-
RFQ
S3532-8GX1.5DSLTL11/64"0.220"0.246"8-328-32UNCScrew Locking-
RFQ
T3532-8GX1.0DSLTL11/64"0.220"0.164"8-328-32UNCScrew Locking-
RFQ
U3532-8GX2.0DTL11/64"0.220"0.328"8-328-32UNCFree Running-
RFQ
V3532-8GX1.5DTL11/64"0.220"0.246"8-328-32UNCFree Running-
RFQ
W3532-8GX1.0DTL11/64"0.220"0.164"8-328-32UNCFree Running-
RFQ
X3532-10GX1.5DSLTL13/64"0.259"0.285"10-2410-24UNCScrew Locking-
RFQ
Y3532-10GX2.0DSLTL13/64"0.259"0.38"10-2410-24UNCScrew Locking-
RFQ

Helical Thread Repair Inserts

Helical thread repair inserts are designed to repair worn threads inside tapped holes. They provide reliable threading in metals, composites, wood or similar materials. Raptor Supplies offers a wide range of thread repair inserts by Heli-Coil, Powercoil and Chrislynn. They are ideal for the automotive, electronics, aerospace, shipbuilding & power generation industries and are used for repairing, recreating or reinforcing stripped bolt / screw threads to withstands higher torque.

Features

  • Helical inserts, also known as screw thread inserts and helicoil inserts, are coiled wire inserts used to restore stripped threads and strengthen bolted connections.
  • These coils are broader than the tapped hole. When the bolt is screwed down after they are inserted into the hole, the coil expands and forms a tight & secure seal against the threads.
  • Helical inserts provide a permanent bond that is stronger than the original bolt fastening.
  • Heli-Coil nitronic 60 thread repair inserts expand upon being inserted via installation tools.
  • They are also used for converting standard threaded holes to accept metric fasteners.

Frequently Asked Questions

What are the four basic helical coil designs?

  • Tanged free-running coils: They feature a stainless steel coil for preventing corrosion and can be used for rapid repair of damaged threads. They adhere to military and aerospace standards.
  • Tang-free free-running coils: They are identical to tanged free-running coils, but have no tang at the bottom. They feature a unique insert-driven notch for screw-in installation and remove the need to detach the tang before inserting the bolt.
  • Tanged screw lock coils: These helical coils feature a straight segment in the coil that is flexed outward, producing pressure on the bolt and retaining torque to ensure the bolt's position. They are designed to maximise the contact area by applying pressure between the flanks of the bolt thread.
  • Tang-free screw lock coils: These have a similar design as tanged screw lock helical coils, but instead of a tang, they employ a driving notch for installation.

Why are some thread inserts larger in diameter than the tapped hole before installation?

Some thread inserts have a slightly larger diameter than the diameter of the tapped hole before installation, as the installation tool decreases the leading coil's diameter when it applies torque to the insert's prong / tang for easy installation. Once the threaded insert is installed, it acts like a spring and expands outward onto the material for strong anchoring.

How to choose the length of a helical insert?

The helical insert length should be at least as long as the desired screw diameter. Users may also choose inserts having longer lengths for increased strength. The exact insert length can vary, depending upon the application & the material. Materials like steel do not need long inserts, but for soft materials like aluminium, a longer insert is preferred.

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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