Item Type: Wire Thread Insert Material: SUS304 Standard: US Units Model: 5-40 Diameter: Approx. 3.175mm / 0.13in Pitch: Approx. 0.64mm / 0.03in Outside Diameter Before Installation: Approx. 4.0-4.4mm / 0.16-0.17in Drill Bit Diameter: Approx. 3.3mm / 0.13in Thread Protective Socket Model Specification Description: For Example: M3 x 0.5 x 1.5D means that after the screw set is completed, the female thread is M3, the pitch is 0.5, and the length is 1.5D (length refers to 1.5 times the diameter, that is, 1.5 x 3=4.5mm) , the length here refers to the length after installation. Wire thread inserts are also called threaded sheaths, stainless steel threaded sockets, wire sockets, and braces. They are a new type of female threaded fasteners made of high-strength, high-accuracy diamond-shaped cross-section steel wires; Application to low-strength engineering materials such as aluminum alloy, zinc alloy, copper, plastic, etc., can significantly improve thread strength and wear resistance. Package List 50 x Wire Thread Insert 1These wire thread inserts can be used to switch between metric and inch threaded holes, which is convenient and quick. 2The thread repair socket is made of 304 stainless steel, which has high strength and wear resistance and is not easy to deform. 3The wire thread insert has elasticity and can distribute the pressure to protect the thread of the workpiece and prolong its service life. 4In the event of thread errors or repairing damaged female thread holes, the wire thread insert can be used as a repair tool. 5These repair sockets are suitable for the manufacture of machinery and equipment such as aviation and ships, automobile maintenance, hardware and electronics.