CARRIAGE BOLT, GRADE A

Carriage Bolt ASTM A307, ASME B18.5, Full Thread to 6", Undersize body over 6". Grade A carriage bolts, also known as A307 Grade A carriage bolts or coach bolts, are hot dipped galvanized bolts made from low- to medium-strength carbon steel. They have a minimum strength of 60,000 psi and are often used for fastening wood. The bolts have a small square section beneath the head that helps to grip and prevent the nut-tightening process from turning the bolt. Grade A carriage bolts are the preferred style for most applications and are comparable to SAE J429 Grade 2 bolts. Find all your grade A carriage bolts at Crest Fasteners.
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