기능

• The outer circumference is a tapered screw with low insertion resistance, prevents cracking, and can be screwed in a straight line without difficulty.
• Independent threads and notched grooves bite into the wood, so there is no need to worry about backsliding or loosening.
• The brim has the function of a flat washer, and is suitable for soft materials and for tightening by sandwiching members.
• Material is zinc alloy die cast with trivalent chromate plating.
• Embedded nut for woodworking.
• It is used when the strength of the mating material or member to be fastened is low and the wood screw does not provide sufficient tightening strength.