Item Type: Thread Repair Inserts_x000D_ Material: SUS304_x000D_ Model: M18 x 2_x000D_ Thread Specification: M18 x 2mm_x000D_ _x000D_ Outside Diameter Before Installation: Approx. 21.4 ~ 22mm / 0.8 ~ 0.9in_x000D_ Drilling Drill Bit Diameter for Installation: Approx. 18.5mm / 0.7in_x000D_ 1D 1.5D 2.5D Length After Installation: Approx. 18mm / 0.7in_x000D_ 27mm / 1.1in_x000D_ 36mm / 1.4in_x000D_ Thread Protective Sleeve Model Specification Description: For Example: M3 x 0.5X1.5D, which means that after the screw set is completed, the internal thread is M3, the pitch is 0.5, and the length is 1.5D (length refers to 1.5 times the diameter, that is, 1.5x3=4.5mm ), the length here refers to the length after installation._x000D_ Wire thread inserts are also called threaded sheaths, stainless steel threaded sleeves, and wire sleeves. They are a new type of female threaded fasteners made of high-strength, high-accuracy diamond-shaped cross-section steel wire; in aluminum alloy, zinc alloy , copper, plastic, synthetic cardboard and other low-strength engineering materials can significantly improve thread strength and wear resistance.