304 / 316 Stainless Steel Thread Insert Natural Color With High Tensile Strength

Introduction

Stainless steel wire threaded sleeves are also called threaded sleeves, threaded sheaths, etc., and are used for various low-strength metal and non-metal materials.
Wire thread insert, also known as thread sheath, is a new type of internally threaded fasteners. It is a spring-like spiral coil precisely processed from high-strength, high-precision, and smooth-surfaced cold-rolled diamond-shaped stainless steel wire. , It is a high-precision concentric body with internal and external threads. The wire thread insert (thread sheath) can form a high-precision internal thread that meets the international standard after being installed in the product, and its performance is better than that of the internal thread formed by tapping directly on the workpiece.

Parameter

Feature

(1) The diameter of the wire thread insert in the free state is slightly larger than the diameter of the screw hole into which it is inserted. When assembling, the wire thread insert is subjected to a special wrench to make its diameter smaller and enters the threaded hole that has been tapped with a special tap. After being installed, the wire threaded sleeve produces a spring expansion effect, making it firmly fixed in the threaded hole, and will never be brought out with the screw out.
(2) Increase the load-bearing capacity and fatigue strength of the threaded connection: the wire threaded sleeve makes the screw and the internal threaded hole for the installation of the wire threaded sleeve form an elastic connection, thus eliminating the screw moment and tooth form half-angle error between the internal and external threads. The load on each thread is evenly distributed over the specified length, thereby strengthening the internal thread and damping vibration, so the fatigue strength of the threaded connection of the parts can be improved.
(3) Wear resistance: The wire thread insert is precisely wound by extremely hard cold-rolled stainless steel wire, the spiral surface hardness can reach HRC43～50, and the mirror-like surface (the smoothness can reach 2～4μm) reduces friction and wear. , Can reduce the torque generated by friction on the screw by 90%, so that the maximum pre-tightening torque and screw tension can be obtained with the minimum screw tightening torque to prevent the screw from loosening and make the screws of various materials in the best use condition.
(4) Corrosion resistance: Due to the excellent corrosion resistance of stainless steel wire threaded inserts, it can ensure its performance in a variety of materials and under normal environmental conditions, and the assembly of steel wire threaded inserts will not stagnate and rust.
(5) Heat resistance: The steel wire threaded sleeve can prevent the threaded connection from jamming or scratching at high temperatures.
(6) Material saving: Compared with ordinary standard internal threads, under the same strength conditions, after using wire thread inserts, in order to make the best use of the yield limit, a smaller size and higher strength screw can be selected. It can save a lot of material, reduce weight and reduce volume.
(7) The locking type wire thread insert can lock the screw in the threaded hole, and can prevent the screw from loosening and falling off when subjected to vibration and impact, which has better process performance than the usual locking device. The locking wire thread insert has multiple disassembly and assembly without reducing the torque of the thread, and it also has high reusability.
Installation tool

Application

In addition to aerospace and military applications, wire thread inserts are also widely used in civil products such as railway transportation, construction machinery, textile machinery, medical equipment, papermaking, weapons, radar, rockets, ships, steam turbines, and chemicals. In foreign countries, it is not only used in aircraft and aerospace industries, but also in industries such as ships, automobiles, machine tools, motors, textile machinery, and instrumentation. Even in light industrial products such as cameras, sewing machines, and modular furniture, this kind of silk cover is widely used.