Carriage bolts, also known as mushroom head, track, or timber bolts, feature a round head and a locking neck that prevents rotation during tightening. Available in square, oval, ribbed, fin, or elliptical neck styles, they offer varying resistance levels for secure fastening. At Adfast Components, we manufacture carriage bolts in both metric and imperial dimensions with UNC, UNF, UN, and ISO thread profiles, across a wide range of materials and ASTM specifications. Explore our offerings for detailed insights on manufacturing, thread types, sizes, grades, torque values, and standards.