Value Collection CAI203101500-050B Carriage Bolt 5/16-18

Product Description

The VALUE COLLECTION CAI203101500-050B is a 5/16-18 UNC carriage bolt with a 1-1/2 inch length under head and a square neck designed to resist rotation during tightening. Manufactured from Grade 2 steel with a zinc plating finish, this fastener meets ASTM A307 standards. The square neck seats flush into wood or pre-drilled holes, allowing a nut to be driven from one side without holding the bolt head. This bolt is a standard inch-system fastener suited for general structural and mechanical assembly work across plumbing, HVAC, electrical, and construction trades.

This carriage bolt is used in a wide range of light- to medium-duty applications including equipment mounting, access panel assembly, ductwork support brackets, and wood-to-metal connections. The zinc plating provides a base level of corrosion resistance suitable for dry or mildly humid indoor environments. It is commonly installed by HVAC technicians, electricians, plumbers, and general contractors where a tamper-resistant, flush-sitting fastener is needed in wood or soft substrates. Sold in a minimum order quantity of 50 pieces per order.

Key Features

• 5/16-18 UNC thread size for standard inch-system hardware compatibility
• 1-1/2 inch length under head for typical light structural connections
• Square neck locks into substrate to prevent rotation during nut installation
• Grade 2 steel construction meets ASTM A307 fastener standard
• Zinc plating finish for basic corrosion resistance in indoor applications

Compatibility

Designed as a standard-fit replacement or new-install fastener for applications requiring a 5/16-18 UNC carriage bolt with a 1-1/2 inch under-head length in inch-system assemblies.

Installation Notes

Installation requires a pre-drilled hole sized to allow the square neck to seat fully and prevent bolt rotation. A standard wrench or socket is used to drive the nut from the opposite side. De-energize or shut down any equipment before installing fasteners in live systems. Follow applicable NEC, IPC, or IFGC requirements for mechanical fastener use in trade applications.