... Head Self Drilling Screw Diameter: #6#14,3.5-6.3 Length:9.5-125mm,3/8-5 Material: C1022 Finish :zinc plated Hex Head Self Drilling ... Screw1) Different kinds of nut available .2) We can supply metric 5,6,8 and imperial grade 2 ... : brighty,zinc plated. yellow zinc plated , hot-dip galvanized, mechanicalplated and black finished.4) Standards: ISO. DIN, AS/ NSZ, GB, ANSI ...