Thread sheath is a new type of internal thread fastener

You will not feel unfamiliar with the threaded sheath. It is a new type of internal threaded fastener, usually a spiral coil precisely formed with high-strength, high-precision, and smooth surface cold-rolled diamond-shaped stainless steel wire. It is a high-precision internal and external thread. Concentric body. The threaded sheath can significantly improve the strength and wear resistance. It can be used on steel, stainless steel and cast iron to improve the durability of the screw, prevent the screw from loosening and falling off due to various vibrations, fatigue fracture, and improve the fatigue resistance of the screw connection strength. Therefore, many people use threaded sheaths to solve some installation failures.

In the case of thread processing errors or repairing damaged internal threaded holes, the thread sheath can be used as a repair method to obtain economical repairs without increasing weight and volume, saving important parts, and quickly and effectively repairing to the original state , And still use the original specification screws to meet or exceed the original design technical requirements. It is very convenient, fast and economical to convert between international standard ←→ inch system ←→ metric unified threads and other series of threaded holes with the threaded sheath. It is usually used for imported and exported products. (Guide: Selection and Analysis of Stainless Steel Fasteners)

According to the thread specifications, threaded sockets can be divided into metric (coarse and fine), unified coarse thread (UNC) and unified fine thread (UNF), and there are also British standards (coarse BSW and fine thread) BSF) and pipe thread (G) specification thread sheath. The tolerance zone of the internal threaded hole after the installation of the wire thread insert depends on the profile manufacturing tolerance of the wire thread insert and the thread tolerance zone of the bottom hole of the wire thread insert. The latter mainly depends on the tapping accuracy of the bottom hole of the wire thread insert, usually 6H When the precision is high, it can reach 5H and 4H tolerance zones, and the uniform thread precision is 2B and 3B. Thread sheath users can choose special installation tools and tapping methods for thread sheath special taps according to the required tolerance zone to ensure that your inspection accuracy and usage requirements are met.

It can be seen that the threaded sheath is a new type of internal threaded fastener, which can effectively enhance the durability of the screw and play an irreplaceable role.

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