기능

• Saw tooth type protrusion on the outer circumference digs into the wood part, so it is hard to come back and there is no need to worry about loosening.
• The tapered driving guide at the tip makes insertion work easy.
• Material is zinc alloy die-cast with trivalent chromate plating (light bluish color).
• Embedded nut for woodworking.
• Used when the strength of the mating material or member to be tightened is low and wood screws cannot provide sufficient tightening strength.
• Tightening strength that can be used for bolts can be obtained just by driving into the pilot hole, and can be used repeatedly.