| Material of Nuts | Stainless steel ;Carbon steel ; Brass, Alloy steel, or as customers’ requirements |
| Grade | class 4.8, class 6.8, class 8.8, class 10.9, class 12.9 |
| Standard | DIN , ANSI , JIS , IFI , NON-STANDARD |
| Surface finishing | Steel: Zinc (White, Blue, Yellow, Black) Stainless steel: Passivated |
| Size | M4-M12 |