Value Collection 34685 Carriage Bolt 1/2-13 5in Grade a Zinc

Product Description

The VALUE COLLECTION 34685 is a 1/2-13 carriage bolt with a 5-inch length under the head, manufactured from Grade A steel with a zinc-plated finish. The square neck design locks the bolt in place against the mating surface during installation, preventing rotation as the nut is tightened. This fastener meets ASTM A307 standards and uses a Unified National Coarse (UNC) thread form. It is a general-purpose structural bolt suited for wood-to-wood and wood-to-metal connections commonly found in construction, equipment mounting, and maintenance applications across mechanical and trade work.

This carriage bolt is used in a wide range of light structural and general fastening applications, including framing, equipment bases, and utility installations. The zinc plating provides basic corrosion resistance suitable for dry or mildly exposed indoor environments. Tradespeople in HVAC, plumbing, electrical, and general construction rely on this fastener type when a flush, round-head profile and anti-rotation square neck are required. Each order is fulfilled in a minimum quantity of 50 pieces, making it practical for stocking in service vans or shop bins.

Key Features

• 1/2-13 UNC thread size for broad hardware compatibility
• 5-inch length under head for deeper material stack applications
• Square neck prevents bolt rotation during nut tightening without requiring a wrench on the head
• Grade A steel construction meets ASTM A307 fastener standard
• Zinc-plated finish provides corrosion resistance in dry and lightly exposed environments
• Inch measurement system with length measured under the head

Compatibility

Designed as a standard 1/2-13 UNC carriage bolt suitable for use with any standard 1/2-13 hex nut and compatible with wood, metal, and composite substrate applications requiring an ASTM A307 Grade A fastener.

Installation Notes

Installation is performed by inserting the bolt through a pre-drilled hole and seating the square neck into the substrate to prevent spinning. Tighten the mating nut using a standard wrench or socket set from the nut side only. Follow applicable building codes and engineering specifications for structural load requirements. Minimum order quantity of 50 units applies to this SKU.