기능

• When used in combination with head machine screws and wood screws, it has a decorative effect.
• It eliminates the need for raking the mating member.
• Brass has excellent conductivity and corrosion resistance.
• Black zinc chromate plating (blackish color).
• Washer for head machine screws and wood screws.
• It has excellent corrosion resistance and is black, so it is convenient for color matching with other members.