Size:M1.2-M8 Standard:GB/JIS/ANSI/DIM/ISO Finish:Zc, Zo, Zw, Zi Baohui hardware electronic co. ltd supplies various of screw, which follow the standard of GB/DIN/ANSI&BS/BSW. Otherwise, we also can made the Non-standard bolt, do it follow sample or drawing or with Requirement Details of you. Commonly ,we supply the screw/bolt follow the GB standard. The range is from M1.2 to M8. From the shapes of screw head, there are Binding/Pan/Flat/Oval/Truss/Round and Hexagon, we usually call those for short by :B-head/P-head/F-head/O-head/T-head/R-head and H-head. From screw drive type, there are Slotted(flat or straight), PE bag, kraft bag, carton