Description:1. Material: Our thread inserts are made of zinc plated carbon steel, with fine workmanship, strong wear resistance, corrosion resistance, high strength, not easy to rust, and long service life.2. Design: The head of these hexagon socket screws is cylindrical, with a hexagonal hole in the top centre, which can provide better torque transmission and more stable performance. Our nut inserts can effectively fix parts, prevent items from loosening or falling off, and improve the stability of their overall structure; the thread size is standard, the thread is clear, and not easy to slip, and the old bolts can be replaced at any time, which is convenient for repairing and adjusting equipment.3.