5/16" BSF Nut Hex BS1083:1965 in Grade A steel.Double chamfer.TPI: 185/16" BSW Nut Hex BS1083:1965£0.29PriceFinishSelf ColouredDiameter5/8"GradeAQuantityAdd to CartDeliveryDelivery costs are based on the weight of your order UK Delivery: 3 to 5 business days International: 5 to 7 business days