Carriage Bolts Round Head SQ Neck

DIN 603, ASME B18.5

Carriage Bolts are round head bolt fasteners with a locking neck style, which prevents turning when the nut is tightened or removed. Round head carriage bolts comes with square neck, oval neck, ribbed neck, fin neck or elliptical neck styles according to the degree of resistance required. Carriage bolts are used with hex nuts or tapped into a hole. Mushroom head bolts, track bolts, timber bolts are other alias of carriage bolts. Carriage bolt dimension are defined in both metric and imperials sizes with unified national coarse pitch (UNC), fine pitch(UNF), fixed pitch(UN) and iso metric thread profile.