United Steel & Fasteners furnishes a variety of Carriage Bolts. Manufactured as A.S.T.M. A-307 and A.S.T.M. A-325 specification.
Available from ¼” diameter through 1 ½” diameter in styles. Round Head Square Neck, Round Head Fin Neck, and Round Head Short Neck. Also available in grades 303, 304, and 316 stainless steel.