| Standard | JIS B 1256 (S) | Compatible Screw Size | M8, M6, M10, M4, M5, M3, M12, M16, M20, M14, M18, |
| material | Carbon Steel, Brass, Stainless Steel, Steel, Alumi | Type | Spring Washers |
| Inside Diameter | 5.5 mm | Surface Treatment | Zinc Plated, Polished, Plain, White Zinc, Yellow Z |
| application | Heavy Industry, Mining, Water Treatment, Healthcar | style | Wedge, Internal Tooth, External Tooth, Countersunk |
| finish | Black, Zinc, Plain, Silver, Stainless Steel, Alumi | Outside Diameter | 16 mm |
| Size | M3,M4,M5,M6,M8,M10,M12,M14,M16,M18,M20-M100 | Delivery time | Normally in 30-40 days. |
| Quality | 100% Professional Test |