Value Collection 781634PS Carriage Bolt 1/2-13 12in Square Neck

Product Description

The VALUE COLLECTION 781634PS is a 1/2-13 carriage bolt with a 12-inch length under head, designed for structural fastening applications where a smooth, round head and square neck are required to prevent rotation during installation. Manufactured from 18-8 stainless steel with a bright, uncoated finish, this bolt resists corrosion in wet, outdoor, and chemically active environments. The UNC (Unified National Coarse) thread form provides reliable engagement across standard 1/2-13 tapped holes and nuts. At 0.676 pounds per unit, this is a full-length heavy fastener suited for demanding structural assemblies. Tradespeople in construction, mechanical, and marine applications rely on this grade for long-service-life fastening without protective coating degradation.

This carriage bolt is used in wood-to-wood, wood-to-metal, and light structural metal connections where a flush, domed head is needed on the face side and a nut and washer are applied from the opposite side. The square neck beneath the head bites into wood or fits square-hole hardware to resist turning without requiring a wrench on the bolt head. Common install scenarios include dock and deck construction, equipment mounting, and framing connections in corrosive or high-moisture environments where carbon steel fasteners would be unsuitable.

Key Features

• 18-8 stainless steel construction provides corrosion resistance in wet and outdoor environments
• 1/2-13 UNC thread standard for compatibility with standard hex nuts and threaded hardware
• 12-inch length under head accommodates thick structural assemblies
• Square neck design resists bolt rotation during nut tightening without additional tooling on the bolt head
• Bright, uncoated finish with no plating or coating to degrade or flake over time

Compatibility

Designed as an OEM-style replacement or stock fastener for structural assemblies requiring 1/2-13 UNC carriage bolts in 18-8 stainless steel with a 12-inch length under head.

Installation Notes

Installation is typically performed by carpenters, ironworkers, or general tradespeople using a standard wrench or socket on the nut side while the square neck seats into the material to hold the bolt stationary. Always pre-drill the correct clearance hole diameter to allow the square neck to seat flush without splitting the substrate. Torque should be applied to the nut only; never apply rotational force to the round head. Follow applicable building codes and fastener specifications for structural connections.