Brass is an alloy of primarily copper and zinc. it is surprisingly strong but a very soft metal. and it is highly corrosion resistant and electric conductor.\n\nstandards: ansi, bs, din, jis etc. specifications: head type: pan head, flat head, round head, oval head, truss head, binding head, fillister head, indented hex head, indented hex washer head, mushroom head square neck, drive type: phillips, slotted, phillips /slotted, hex, torx, pozi, square, diameter: #0-3 /4” length: 1 /8" - 6"