คุณลักษณะ

• Since it is tightened with a hex spanner, it can be used even if the head is embedded.
• Alloy steel is heat treated to increase strength.
• Trivalent black galvanized (blackish color) for improved corrosion resistance and black appearance.
• If L size (under neck) is long, it will be a half screw.
• Used for general tightening of machines, vehicles, etc., and for fastening that requires more strength than hexagonal bolts.
• Has more corrosion resistance than fabric.
• Also, since it is black, it is convenient to match the color with the other member.