Hillman Fasteners 230057 Hex Head Lag Bolt 5/16x3 in Zinc 100pk

Product Description

The HILLMAN FASTENERS 230057 is a zinc-plated hex head lag bolt designed for heavy-duty fastening applications in wood and structural assemblies. Measuring 5/16 inch in diameter by 3 inches in length, this lag bolt provides strong holding power in framing, decking, ledger attachment, and general carpentry work. The hex head drive allows installation with a standard socket or wrench, making it a reliable choice for carpenters, contractors, and trade professionals who need consistent fastener performance across high-volume jobs. This pack includes 100 bolts, supporting larger project runs without repeated reordering.

These lag bolts are suited for residential and light commercial construction tasks where a coarse-threaded wood screw with hex drive is required. Common applications include deck ledger board attachment, fence post hardware, structural timber connections, and general wood-to-wood or wood-to-framing fastening. The zinc finish provides basic corrosion resistance for interior and dry exterior applications. Each box contains 100 pieces, making this package appropriate for production framing crews, finish carpenters, and general contractors working through higher fastener volumes.

Key Features

• 5/16 inch diameter by 3 inch length for standard structural fastening tasks
• Zinc finish provides corrosion resistance for interior and protected exterior use
• Hex head drive compatible with standard sockets and wrenches
• 100-piece pack reduces restocking frequency on volume jobs
• Coarse thread designed to bite and hold in wood substrate

Compatibility

Designed as a standard 5/16 x 3 inch hex head lag bolt for use in wood framing, decking, and structural lumber applications where this fastener size and drive type are specified.

Installation Notes

Lag bolts should be installed by a qualified carpenter or contractor following applicable building codes, including IRC or IBC requirements for structural connections. Always drill a pilot hole sized to the shank diameter before driving to prevent wood splitting and ensure proper seating. Use a socket wrench or impact driver with the correct socket size rather than pliers or adjustable wrenches to avoid rounding the hex head. Do not overtighten, as this can strip threads in the wood substrate or damage the fastener head.