Description: Self-tapping inserts do not have to be tapped in advance. They can be screwed directly into the special holes reserved by the base material with an installation tool, which is economical and beautiful. They can also increase the thread strength for new products, which are used throughout the entire metal and plastics processing industry. Features: 1. Due to self-tapping ability, the base material does not have to be tapped in advance. 2. It has a large contact area with the finished product, strong pull resistance. 3. Strong resistance to vibration, which can prevent loosening. 4. There is no clearance with the base material and the base material also has good air tightness if it contains bubbles. 5. Easy and quick to install - only need one assembly tool. Specifications: Material: SUS303, SUS316, Carbon Steel Quantity: 50pcs Weight: Approx. 192g Package Includes: 10 x M3*0.5 Thread Insert 10 x M4*0.7 Thread Insert 10 x M5*0.8 Thread Insert 5 x M6*1.0 Thread Insert 5 x M8*1.25 Thread Insert 5 x M10*1.5 Thread Insert 5 x M12*1.75 Thread Insert