기능

• The structure has screws on both the outer and inner diameters.
• Since the cutting edge of the three-hole or split groove has a tapping function to the base material bottom hole (drill hole or molding hole), tapping is not required.
• Self-locking mechanism makes it hard to loosen even when the bolt is attached and removed.
• The material is carbon steel.
• As an insert nut, it can be used to reinforce internal threads of plastics, cast iron, bakelite, light alloy, etc., or to repair screws that do not work.