Self-tapping Thread Inserts is a kind of fastener with internal and external thread and cutting hole or groove.There are two kinds of materials:carbon steel and stainless steel.The surface of carbon steel is galvanized (yellow zinc,color zinc and blue zinc),and stainless steel is the natural color of metal.
"The latch screw is inserted into the tapped bottom hole, and then the four latch pins are pressed in to provide a strong fastening effect. The product is mainly used for products that require high thread strength."