Value Collection CAI503701750-050B Carriage Bolt 3/8-16

Product Description

The VALUE COLLECTION CAI503701750-050B is a 3/8-16 carriage bolt with a 1-3/4 inch length under head and a square neck profile. Made from Grade 5 steel with a zinc-plated finish, this bolt is designed for structural fastening applications where a smooth, dome-shaped head and anti-rotation neck are required. The UNC thread standard ensures wide tool and nut compatibility. Installers rely on carriage bolts like this one when a flush, tamper-resistant head face is needed on the accessible side of a joint.

This carriage bolt is suited for wood-to-wood, wood-to-metal, and light structural connections in residential and commercial construction, HVAC equipment mounting, electrical enclosure assembly, and general mechanical fastening. The square neck bites into wood or pre-drilled soft materials to prevent rotation during nut tightening without requiring a wrench on the bolt head. Sold in multiples of 50 per order.

Key Features

• 3/8-16 UNC thread for broad nut and hardware compatibility
• 1-3/4 inch length under head suits medium-depth fastening applications
• Square neck resists rotation in wood and soft-material assemblies
• Grade 5 steel construction meets SAE J429 strength requirements
• Zinc-plated finish provides basic corrosion resistance in dry or mildly humid environments

Compatibility

Designed as a standard UNC carriage bolt compatible with 3/8-16 hex nuts, washers, and hardware conforming to inch-system fastener standards.

Installation Notes

Carriage bolts are typically installed by tradespeople and general contractors using standard hand tools. Drill or punch a clearance hole sized for the bolt shank, insert the bolt so the square neck seats firmly into the material, then thread and tighten a compatible 3/8-16 nut from the opposite side. Do not apply a wrench or impact to the bolt head, as this will damage the dome profile and may break the square neck seat.