1,Material: Steel, Stainless Steel, Aluminum and Brass. 2,Plating: Zinc Plating & Zn-Ni Plating. ... : M3~M12 Inch Thread: UNC6-32~1/2-13Material: steel, aluminium, stainless steel, brassPlating: Yellow Zinc Plating, White Zinc Plating, Black Zinc ...