Black Mild Steel round washers manufactured to various British and European standards. BS4320 Form E, BS4320 Form F and BS4320 Form G are the main metric standards. BS3410 Table 7 and BS3410 Table 8 for imperial standards. BS4395 Thru/Hardened also manufactured and stocked. Self Colour, Galvanized and Zinc Plated round washers. Other finishes on demand. Non-standard round washers available in a range of materials including, Mild Steel, Stainless Steel, Brass, Copper and Exotic Alloys.