Item Type: Wire Thread Insert Material: SUS304 Model: M3.5 x 0.6 Thread Specification: M3.5 x 0.6 Outside Diameter Before Installation: Approx. 4.5-4.8mm / 0.18-0.19in Drill Bit Diameter: Approx. 3.7mm / 0.1in 1D Length After Installation: Approx. 3.5mm / 0.1in Number of Turns Before Installation: 4 1.5D Length After Installation: Approx. 5.3mm / 0.2in Number of Turns Before Installation: 6.4 2D Length After Installation: Approx. 7.0mm / 0.28in Number of Turns Before Installation: 8.9 2.5D Length After Installation: Approx. 8.8mm / 0.35in Number of Turns Before Installation: 11.4 3D Length After Installation: Approx. 10.5mm / 0.4in Number of Turns Before Installation: 13.9 Wire Thread Insert Model Example: M3 x 0.5 x 1.5D, meaning after installation, the internal thread is M3, pitch is 0.5, and the length is 1.5D (1.5 times the diameter, 1.5 x 3 = 4.5mm). Length refers to the installed length. Wire thread inserts are also known as threaded inserts, stainless steel threaded sleeves, wire inserts, or thread inserts. They are high-strength, precision internal threaded fasteners made from diamond-shaped cross-section steel wire. Ideal for use in low-strength materials such as aluminum, zinc, copper, and plastic, enhancing thread strength and wear resistance.