1The self-tapping screw sleeve has self-tapping ability, and the base material does not need to be tapped beforehand. 2Self-tapping screws have a maintenance effect on damaged threads. 3Thread and repaired can continue to use. 4The self-tapping screw sleeve has strong resistance to vibration and prevents loosening. 5Simpler, more convenient and faster than ordinary wire screw sleeves. 6Widely used in automobiles, rail car, military supplies, ships, home appliances, construction machinery, communication equipment, electronic products, engineering plastics, metal die castings, etc.
