Hillman Fasteners 230128 Hex Head Lag Bolt 1/2x3-1/2 Zinc 25PK

Product Description

The HILLMAN FASTENERS 230128 is a zinc-plated hex head lag bolt sold in a 25-pack, sized at 1/2 inch diameter by 3-1/2 inch length. Lag bolts in this size range are heavy-duty wood fasteners designed to pull and hold structural members together under significant load. The hex head drive style accepts a standard socket or wrench, making installation straightforward in tight framing situations. The zinc plating provides basic corrosion resistance for interior and protected exterior applications. This fastener is commonly specified by contractors, electricians, plumbers, and HVAC technicians for equipment mounting, structural blocking, and bracket attachment.

This lag bolt is suited for structural wood-to-wood fastening and equipment anchorage tasks found in residential and light commercial construction and mechanical work. Typical applications include mounting HVAC equipment supports, plumbing hangers, electrical panel backing boards, and general structural connections where a heavy-duty threaded fastener is required. The 25-pack quantity is sized for job-site use where multiple fasteners are needed per task.

Key Features

• 1/2 inch diameter by 3-1/2 inch length for substantial holding strength in wood substrates
• Hex head drive accepts standard socket wrenches and impact drivers
• Zinc plating for basic corrosion resistance in interior and protected exterior environments
• 25-pack quantity supports multi-fastener installations without multiple orders
• Heavy-duty lag thread profile for deep wood bite and high pullout resistance

Compatibility

Designed as a general-purpose structural lag bolt for wood framing, blocking, and equipment mounting applications where a 1/2 inch diameter by 3-1/2 inch fastener is specified.

Installation Notes

Lag bolts of this diameter typically require a pilot hole to prevent wood splitting and to ease installation — consult applicable building codes or manufacturer guidelines for recommended pilot hole sizing. Drive with a socket wrench or impact driver rated for hex head fasteners. Do not overdrive; stop when the head seats flush or to the specified depth for the application. Follow IBC, IRC, or project-specific structural requirements when using lag bolts in load-bearing connections.