Standards ASTM B473, ASME SB473 Dimensions DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3 Fasteners size Bolt / Screw Size : M3 â?? M56 | 3/6â?³ to 2â?³ | Custom Sizes. Nuts Size : M3 â?? M56 | 3/6â?³ to 2â?³ | Custom Sizes. Washers Size : M3 â?? M56 | 3/6â?³ to 2â?³ | Custom Sizes. Machine Screws Size : M1.6 â?? M12. Self Tapping Screw Size : No.2 â?? No. 14. Length 3 mm to 200 mm Threads UNF, BSW, BSF, METRIC, UNC or as required Surface Coating Ptfe Coated Fasteners Phosphate Coating Teflon Coating Zinc Coating Hot Dipped Galvanizing Coating Cadmium Coating Xylon Coating Finishing Self-Colour, Passivated, Bright Zinc Plated (BZP), Hot Dip Galvanised (HDG), Sherardized, some special one like DACROMET Geometry and Mechanically Applied coating ,Dacroment, nickel plated, anodizing, plated zinc-nickel Zinc (blue, black, yellow, white), black oxide.