Hexagon head bolts ISO 4017 M12x40/40 4 000 pcs. Raw material grade: 1.4501 Superduplex UNS S32760 / F55 / X2CrNiMoCuWN25-7-4 Rm = 730MPa mini 3.1 cert as per EN 10204 required Hexagon nuts ISO 4032 M12 4 000 pcs. Raw material grade: 1.4410 Superduplex UNS S32750 / F53 / ASTM A479 / X2CrNiMoN25-6-3 Rm = 730MPa mini 3.1 cert as per EN 10204 required