M6 - 6mm COACH BOLTS SCREWS CUP HEX CARRIAGE BOLTS MILD STEEL ZINC DIN 603 / 555
M6 /6 mm SQUARE CARRIAGE BOLT COACH SCREW. - M6 Square carriage bolt Zinc. - M6 Hexagonal Zinc Nut. - M6 Flat Zinc Washer. Carriage bolts are extensively used in security fixings, where the bolt must only be removable from one side.