... .0*6Material: Brass, Bronze, Carton steel(low/medium/high carbon steel) Stainless steel, Aluminum alloy,Surface Treatment: ... , Plating, Anti-slipping patchCategory: 1. by components Bolts, Screw bolts/Studs, Nuts, Tapping screws, Wooden screws, Washers/Gaskets ... Button, PF, Pan washer, Cheese, Countersunk, Fillister, hexagon, Hexagon washer head, Hexagon socket button head and etc. 3. by type of ...