Application: A self-tapping thread insert can increase thread strength for new products, which are used throughout the metal and plastic processing industry. Instructions: Due to the self-tapping capability, the base material does not need to be tapped in advance. They can be screwed directly into the special holes reserved by the base material using an economical and aesthetic installation tool. Good airtightness: there is no game with the base material and the base material also has good air tightness if there are bubbles. Specifications: Material: SUS303, SUS316, carbon steel; Quantity: 50pcs ;Weight: approx. 192g. Easy and quick to install - requires only one assembly tool. It has a large contact surface with the finished product, strong tensile strength. Strong vibration resistance that can prevent loosening.