Hillman Fasteners 240168 Carriage Bolt 3/8-16 X 3 in 50 Pack

Product Description

The HILLMAN FASTENERS 240168 is a 3/8-16 x 3 inch steel carriage bolt designed for structural fastening applications across construction, woodworking, and general trade use. The round dome head provides a smooth finished surface on the visible side, while the square neck seats into wood or soft material to prevent rotation during installation. The coarse thread pattern allows for fast engagement and strong holding power in typical wood-to-wood and wood-to-metal connections. Each package contains 50 bolts, making this a practical supply for job-site or shop use where multiple fasteners are required.

This carriage bolt is suited for residential and light commercial construction tasks including deck framing, fence installation, post connections, and structural wood assemblies. Trades commonly reaching for this fastener include carpenters, general contractors, and maintenance technicians. The coarse 3/8-16 thread is compatible with standard hex nuts and washers of the same thread specification, which are typically installed on the back side of the assembly with a wrench or socket.

Key Features

• Round dome head delivers a low-profile, finished appearance on the face side
• Square neck resists bolt rotation without requiring a wrench on the bolt head
• Coarse 3/8-16 thread for fast engagement and strong holding in wood and soft materials
• 3 inch grip length suits standard structural lumber connections
• Steel construction for strength in load-bearing assemblies
• 50-count pack reduces restocking frequency on active job sites

Compatibility

Designed as a standard 3/8-16 coarse thread carriage bolt for use with matching 3/8-16 hex nuts, flat washers, and lock washers in wood framing, decking, and general structural assemblies.

Installation Notes

A licensed carpenter or general tradesperson typically installs carriage bolts by drilling a clearance hole sized to the bolt diameter, then driving the bolt through so the square neck seats flush and locks against rotation. A nut and washer are threaded onto the exposed end and tightened with a wrench or socket — no tool is needed on the head side once the square neck is seated. Follow applicable building codes for structural fastener spacing and load requirements. Do not overtighten in soft or engineered wood substrates to avoid crushing the material around the head.