Classification of wire thread inserts

1. Classification by use function

A. Ordinary threaded inserts (Helicoil Free-Running Inserts) marked "FR"

B. Locking type Helicoil Screw Lock Inserts are marked “SL”

2. Classification by wire thread insert material

A. Cr-Ni stainless steel material: through the combination of strength and material, It is used under normal circumstances, in light structures, aluminum alloy structures, sea water, chlorine-containing liquids, and to increase corrosion resistance.

B. Copper alloy material: used when copper is required or when the threaded connection of rotation is often adjusted; used when required for conductive or self-lubricating situations.

C. High-temperature alloy materials: heat-resistant when the temperature is between 500 and 750°C; used for aerospace assembly technology, aircraft engines, and internal combustion engine turbine compressors operating within 750°C.

3. Classification according to the type of internal thread formed

A. International standard ISO "M, MJ" series wire thread inserts

Thread series mark "M" , "MJ"; Spark plug Thread thread inserts are in this series

B. Unified thread "UN" series wire thread inserts (UNIFIED Thread Series)

Coarse thread Marked "UNC", fine thread marked "UNF", ultra-fine thread marked "UNEF"

C. Non-thread sealed pipe thread (British Standard Pipe Thread) thread marked number is "G"< /p>

4. Classification according to the direction of rotation of wire thread inserts

A. Right-hand wire thread inserts

B. Left-hand wire thread inserts

5 , classified by whether the wire thread inserts have an installation handle

A. Wire thread inserts with an installation handle

B. Wire thread inserts without an installation handle