Material | Carbon steel (zinc-nickel plated or blue/white zinc) . |
Diameter Range | M3–M20 (customizable to imperial/metric standards) . |
Length Range | 6–150mm (customizable) . |
Surface Finish | Zinc-nickel, blue/white zinc, or black zinc (eco-friendly options) . |
Standards | GB/T 15856.1-2002, DIN 968, ISO 7049 . |
Washer Type | Square washer or flat washer (integrated with screw) . |