Type 1-A TRX Tamper-Proof Pan Head Tapping Screw

[Materials] Steel Stainless steel
[Surface treatment]None, None, Non-chrome black, Trivalent chromate non-chrome plating white, Trivalent black, Trivalent white, Bright chromate plating, Chromate plating, Chromate plating, Black chromate, Nickel plating, German-brown plating, Black paint, Head coating (black), Black paint, Temper color, Temper color, Temper color (thick)