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HARFINGTON 20pcs Wire Threaded Inserts 1/4-20 UNC 2D 12.7mm 304 Stainless Steel Helical Coiled Wire Thread Sleeve

4.9 (9) Write Review
Free shipping on orders over $29.99

$6.29

$ 2 .99 $2.99

In Stock

1.Size:1/4-20 Unc


About this item

  • Size - Thread size: 1/4-20 UNC; effective length (after Installation): 2D = 12.7mm / 0.5"; free state length: 11mm / 0.43"; free state outer diameter: 7.9mm / 0.31"; type: helical; surface treatment: white washing.
  • Material - 304 stainless steel has good corrosion resistance, rust prevention, high hardness, and excellent oxidation resistance. It is austenitic stainless steel, which is non-magnetic or slightly magnetic.
  • Features - Designed with a certain of elastic, and provides an even load. Wire thread inserts have self-tapping capability without pre-tapping the base metal. Large contact surface with finished products, strong tensile force. Strong resistance to vibration, no deformation.
  • Applications - Mainly used for various low-strength metal and non-metal materials, such as aluminum, magnesium, cast iron, plastic, rubber, MDF, ceramics, fiberglass, wood. Improve the strength and wear resistance of threaded connections, prevent thread loosening and slippage
  • Note - When the installation amount is small, take the corresponding bolts + nuts, fix the thread insert on the screw and fix it with the same type of nut to make the three in one. Use a wrench to screw the threaded insert into the bottom hole and remove the screw.


Product Description

Thread Inserts

Key Features

304 stainless steel has good corrosion resistance, rust prevention, high hardness, and excellent oxidation resistance. It is austenitic stainless steel, which is non-magnetic or slightly magnetic. With self-tapping sleeves, the same screw can be used continuously.

Features a certain of elastic, and provides an even load on the thread. Wire thread inserts have self-tapping capability without pre-tapping the base metal. Large contact surface with finished products, strong tensile force. Strong resistance to vibration, no deformation.

Thread Inserts

Wide Applications

Greatly improve the strength and wear resistance of threaded connections, prevent thread loosening and slippage, and repair damaged internal threaded holes.

Mainly used for various low-strength metal and non-metal materials, such as aluminum, magnesium, cast iron, plastic, rubber, MDF, ceramics, fiberglass, wood.

Thread Inserts
Thread Inserts

Notice

When the installation amount is small, take the corresponding bolts + nuts, fix the thread insert on the screw and fix it with the same type of nut to make the three in one. Use a wrench to screw the threaded insert into the bottom hole and remove the screw.

When the installation amount is large, use special installation tools to install. Drill holes with the appropriate size drill bit, then tap with the same size tap as the bolt. Put the screw sleeve on the installation tool and adjust the height of the pipe position. Gently screw the screw sleeve into the hole until the end of the screw sleeve is between 1/2 and 1/4 of the plane of the screw hole. Twist the crossed wires with the break tool instead of the installation tool.


customer
2025-09-03 13:09:41
Needed longer inserts than came with my kit for deeper threads and these work perfect.
dustin
2025-08-17 15:18:50
Works fine for replacement helicoil brand kit
Busybuildr
2025-08-04 18:22:58
Work great !
WILSON CLAVIJO
2025-06-01 18:06:00
SI ERA LO QUE ESPERABA MUCHAS GRACIAS
Edward J.
2025-05-27 12:26:13
Fit and function ok
Johns
2025-05-18 18:11:59
JUNK!
Tom
2025-05-09 11:54:54
used to restore head bolt threads in model T Ford good product
ScubaNV
2025-03-16 10:21:45
Fixed the the problem from crimping to bolting the end on and make it reusable, can change ends any time
Nigel Downing
2025-01-23 10:46:06
product works very goodused the helicoil tap from original sethad no trouble screwing the helicoil in and the boltsare a nice fit not too loose