... -carbon-steel2) Finish: Polished, electric galvanized, hot dipped galvanized3) Head: common head, countersunk head, lose head, flat countersunk chequerred head4) Shank: plain, round5) Point: diamond point, round ... dipped galvanized/H.D.G.3)head:countersunk checked head ,lose head4)shank:plain shank,twisted shank ,screw shank5)point:diamond point, round point6 ...