Value Collection 781456PS Carriage Bolt 1/2-13 4 in Square Neck

Product Description

The VALUE COLLECTION 781456PS is a 1/2-13 UNC carriage bolt with a 4-inch length under head and a square neck, manufactured from 18-8 stainless steel with a bright uncoated finish. Carriage bolts are designed for through-bolting applications where a smooth, rounded head is required on the visible face and the square neck resists rotation as the nut is tightened from the opposite side. The 18-8 stainless steel construction provides solid corrosion resistance, making this bolt appropriate for both indoor and outdoor installations. This fastener is used by contractors, electricians, plumbers, carpenters, and general tradespeople across a wide range of structural and mechanical fastening tasks.

This bolt fits applications that require a 1/2-13 UNC thread pattern with a 4-inch grip length measured under the head. Common installation scenarios include wood-to-wood connections, equipment mounting through panels, and utility framing work. The square neck seats into pre-drilled square or round clearance holes in wood or soft materials to prevent spinning during installation. The bright uncoated finish is suited for dry environments or installations where material compatibility with 18-8 stainless is a priority, such as marine-adjacent, food service, or corrosive-environment framing.

Key Features

• 1/2-13 UNC thread size for broad hardware compatibility
• 4-inch length under head for adequate grip in standard structural applications
• Square neck design prevents bolt rotation during nut tightening
• 18-8 stainless steel construction provides corrosion resistance
• Bright uncoated finish — no coating to flake, chip, or interfere with fit
• Inch measurement system; UNSPSC Code 31161603

Compatibility

Designed as a standard 1/2-13 UNC carriage bolt suitable for through-bolt fastening applications in wood, composite, and other materials that accept a square-neck anti-rotation seat.

Installation Notes

Installation is performed by hand and standard wrenching tools — no specialty trade license is typically required, though structural fastening may be subject to local building code requirements. Always drill a clearance hole sized to allow the square neck to seat fully and prevent rotation before driving the bolt through. Tighten the hex nut from the threaded end only; do not apply torque to the domed head. Verify material compatibility with 18-8 stainless steel before installation in environments with dissimilar metals to avoid galvanic corrosion.