Value Collection CAI203101000-050B Carriage Bolt 5/16-18

Product Description

The VALUE COLLECTION CAI203101000-050B is a Grade 2 steel carriage bolt with a 5/16-18 UNC thread and a 1-inch length under head. It features a square neck profile that locks into pre-drilled holes in wood or soft materials, preventing rotation during installation without requiring a wrench on the bolt head. The zinc plating provides basic corrosion resistance for interior and light-duty exterior applications. This fastener meets ASTM A307 standards and is sold in a minimum order quantity of 50 pieces, making it appropriate for stocking or batch fastener work on construction and assembly projects.

This carriage bolt is used in light structural wood connections, equipment mounting, and general assembly tasks encountered in residential construction, facility maintenance, and trade rough-in work. The 5/16-18 coarse thread engages standard nuts and threaded hardware readily. The zinc finish suits dry or low-moisture environments. Plumbers, electricians, HVAC techs, and general contractors commonly stock these fasteners for equipment pad mounting, panel bracing, and structural attachment details.

Key Features

• 5/16-18 UNC coarse thread for compatibility with standard nuts and hardware
• Square neck locks bolt in place during nut tightening without secondary tooling on the bolt head
• Grade 2 steel construction meets ASTM A307 load requirements for light structural use
• Zinc plating provides corrosion resistance in dry and low-humidity environments
• 1-inch length under head suits thin-panel and light-framing connections
• Sold in 50-piece minimum quantity for stocking and batch installation use

Compatibility

Designed for use with standard 5/16-18 UNC hex nuts and washers in wood-to-wood or wood-to-metal connections where a flush, rotation-resistant bolt head is required.

Installation Notes

A licensed contractor or qualified tradesperson should verify that fastener grade and size meet the load requirements of the specific application before installation. Drill a clean through-hole sized to allow the square neck to seat flush and grip properly. Drive the bolt through the material, seat the square neck into the hole, then apply a washer and nut and tighten with a standard wrench or socket. Do not over-torque; Grade 2 fasteners have lower proof load limits than Grade 5 or Grade 8 hardware.