BOLTS CUP SQUARE BOLT & NUT A-Z FASTENERS PLEASE CLICK Anchors Bolts Inserts Nails Nuts Pins Rivets Screws Studs Washers CUP SQUARE BOLT & NUT DIN 603 GRADE 4.6 BS 4168 – ISO 7380 – Stainless Steel Grade A2 (304) FINISH Black, Electro Galvanized & Hot Dipped Galvanized. Size (mm) M6 M8 M10 M12 20 * * * * 25 * * * * 30 * * * * 35 * * * * 40 * * * * 45 * * * * 50 * * * * 55 * * * * 65 * * * * 75 * * * * 90 * * * * 100 * * * * 115 * * * 125 * * * 140 * * * 150 * * *