o Material: Steel, Brass, Stainless Steel, Aluminum.
o Screw Head: pan, dome (bottom), round, truss (mushroom), flat (countersunk), oval (raised head), inner hexagon, hexagon
o Types of screw drives: Slot and Cross, POZIDRIV
o Plating: Zn-plated, Ni-Plated
o Accessory: flat washer and spring washer
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