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Grade 5 Carriage BoltHillman Item #422766
Carriage bolts are designed to fasten a wooden face to either a wood or metal frame. Its flat head is designed to eliminate the need for a washer and provide a semi-flush finish to applications. The square underside of the head is self-locking to eliminate spinning and the need for a driving tool. Bolts are grade 5, meaning they've been quenched and tempered to provide a high strength.