Hillman Fasteners 812545 Galvanized Carriage Bolt 100 Pack

Product Description

The HILLMAN FASTENERS 812545 is a galvanized carriage bolt sized at 5/16 inches in diameter by 2 inches in length, sold in a 100-count pack. It is designed to fasten a wooden face to either a wood or metal frame in structural and general construction applications. The flat, domed head eliminates the need for a washer and provides a semi-flush finish. The square underside of the head is self-locking, preventing spinning during installation without requiring a separate driving tool. The galvanized coating delivers corrosion resistance for outdoor and high-moisture environments, though the finish may appear chalky.

This carriage bolt is suited for residential and light commercial construction tasks where wood-to-wood or wood-to-metal connections are required. Common applications include deck framing, fence assembly, structural lumber connections, and equipment mounting where a clean, low-profile head finish is preferred. The 100-count pack is intended for contractors and trade professionals working on higher-volume fastening jobs. Units are packaged in boxes of 12 packs per case.

Key Features

• Galvanized finish provides corrosion and rust resistance in outdoor and damp conditions
• Flat domed head eliminates the need for a separate washer and delivers a semi-flush finish
• Square neck under the head is self-locking to prevent bolt rotation during nut tightening
• No driving tool required due to the self-locking square underside design
• 100 bolts per pack supports higher-volume fastening applications
• 5/16 inches x 2 inches sizing fits standard framing and structural lumber connections

Compatibility

Designed for fastening wood-to-wood and wood-to-metal frame assemblies in standard construction and structural applications requiring a 5/16-inch carriage bolt.

Installation Notes

Carriage bolts are typically installed by carpenters, general contractors, or construction tradespeople. Drill a clean hole sized to the bolt diameter before insertion to allow the square neck to seat properly and prevent spinning. Always use an appropriately sized nut and tighten from the nut end only. Follow applicable building codes for structural fastener requirements when used in load-bearing assemblies.