... StandardLength:According to drawings or StandardMaterial:Carbon steel, Stainless steel ,Copper, Alloy SteelSurface:Plain, zinc plated,HDG, phosphate,Zinc Flake Coating ... , BS, JIS, GB, ISO and other standard&non-standard specifications base on our customers’ special request and drawings.We also specialized ... ."Whenever you need fasteners, contact us ” Special nuts and bolts / base on customers'drawing