... -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 ... /E.g or hot dipped galvanized/H.D.G.3)head:countersunk checked head ,lose head4)shank:plain shank,twisted shank ,screw shank5 ...