| Standard | GB, DIN, ISO, ANSI/ASTM, BS, BSW, JIS etc |
| Size | M4-M24 or non-standard as request&design |
| Material | Carbon steel, stainless steel, alloys steel etc. |
| Grade | a2,a4,4.8,8.8,10.9,12.9.etc |
| Packing | Box, carton or plastic bags, then put on pallets, or according to the demand of the customers |