Value Collection CAI503701250-100BX Carriage Bolt 3/8-16

Product Description

The VALUE COLLECTION CAI503701250-100BX is a 3/8-16 carriage bolt with a 1-1/4 inch length under head, manufactured from Grade 5 steel with a zinc-plated finish. The square neck below the dome head locks into wood or soft material as the nut is tightened, preventing rotation without requiring a wrench on the bolt end. The zinc coating provides a basic barrier against corrosion in dry to mildly humid environments. This fastener is packaged in a box of 100 and is suited for general structural assembly, HVAC equipment mounting, and light mechanical applications where a smooth, rounded head is required on the visible or contact side of the joint.

Carriage bolts with a 3/8-16 UNC thread are widely used in wood-to-wood and wood-to-metal connections, including equipment curbs, equipment stands, ductwork supports, electrical panel mounting structures, and general fabrication. The 1-1/4 inch under-head length suits thinner stock and bracketed connections. Installation requires only a standard wrench or socket on the nut side. These are appropriate for interior and sheltered exterior applications where exposure to standing moisture is limited, as zinc plating offers moderate rather than heavy corrosion resistance.

Key Features

• 3/8-16 UNC thread for compatibility with standard inch-series nuts and tapped holes
• 1-1/4 inch length under head suits thin stock and bracket connections
• Square neck prevents bolt rotation during tightening without a second tool
• Grade 5 steel provides medium-strength tensile performance for structural assembly
• Zinc-plated finish offers corrosion resistance in dry and sheltered environments
• Sold in a 100-piece box for job-site and shop inventory efficiency

Compatibility

Designed as a standard inch-series 3/8-16 UNC carriage bolt suitable for use with any matching 3/8-16 hex nut and flat or lock washer in general structural, mechanical, and trade-installation applications.

Installation Notes

Insert the bolt from the face side so the square neck seats fully into the material before applying torque to the nut. A licensed installer or experienced mechanic should verify that the Grade 5 rating meets the load requirements of the specific application before use in structural connections. Follow applicable building codes and equipment manufacturer torque guidelines for the joint type. Do not use in continuously wet or chemically aggressive environments without upgrading to a higher-grade corrosion-resistant finish.