Value Collection 34575 Carriage Bolt 1/4-20 3/4 in Square Neck

Product Description

The VALUE COLLECTION 34575 is a 1/4-20 UNC carriage bolt with a 3/4-inch length under head, designed for general fastening applications across construction, equipment assembly, and light structural work. The square neck beneath the round head locks into wood or metal during installation, preventing rotation as the nut is tightened. Built from Grade 2 steel with a zinc-plated finish, this bolt meets ASTM A307 standards and offers basic corrosion resistance suitable for dry and mildly exposed indoor environments. It is a standard inch-system fastener installed by carpenters, general contractors, and maintenance technicians.

This carriage bolt is suited for residential and light commercial applications including wood framing connections, equipment mounting, fence and gate hardware, and utility panel assemblies. The 1/4-20 thread size is widely used across HVAC support brackets, electrical enclosure mounting, and plumbing fixture attachment. The zinc plating provides a protective layer appropriate for interior or sheltered installations. Sold in multiples of 100, making it practical for job-site stock or bulk fastener inventory.

Key Features

• 1/4-20 UNC thread for compatibility with standard inch-system nuts and hardware
• 3/4-inch length under head suits thin stock and shallow-profile fastening applications
• Square neck prevents bolt rotation during tightening without requiring a wrench on the head
• Grade 2 steel construction meets ASTM A307 fastener standards
• Zinc-plated finish provides basic corrosion resistance for interior and sheltered use

Compatibility

Designed as an OEM-style replacement or stock fastener for general-purpose 1/4-20 inch-system applications requiring a square-neck carriage bolt per ASTM A307.

Installation Notes

Installation is typically performed with a standard wrench or socket on the mating nut; the square neck seats into the substrate to hold the bolt stationary. Ensure the receiving material has a hole sized correctly to allow the square neck to seat flush and lock without excessive force. Follow applicable building codes or equipment manufacturer torque guidelines when assembling structural or load-bearing connections. Minimum order quantity is 100 units per order.