Value Collection 3164BMQ Square Head Bolt 5/16-18 Unc

Product Description

The VALUE COLLECTION 3164BMQ is a square head bolt designed for general fastening applications in mechanical, structural, and trade installations. It features a 5/16-18 UNC thread size with a 4-inch length under the head. The square head profile allows a wrench to grip from multiple angles, which is useful in tight or awkward spaces where a hex head may not be practical. Manufactured from Grade 2 steel with no coating, this bolt meets ANSI/ASME B18.2.1 dimensional standards. Licensed tradespeople working in HVAC, plumbing, electrical, and general mechanical service will find this bolt appropriate for a wide range of light- to medium-duty fastening tasks.

This bolt is suited for residential and commercial applications where a UNC threaded fastener is required. The 5/16-18 UNC thread pitch is a standard coarse thread commonly used in steel-to-steel connections, equipment mounting, and general assembly. The uncoated finish makes it suitable for dry indoor environments. It is typically installed by hand-starting the thread and tightening with an open-end, box-end, or adjustable wrench. This bolt is sold individually per package with a minimum order quantity of 50 pieces.

Key Features

• Square head profile allows multi-angle wrench engagement in confined spaces
• 5/16-18 UNC coarse thread for reliable steel-to-steel fastening
• 4-inch length under head provides adequate grip range for thicker assemblies
• Grade 2 steel construction meets ANSI/ASME B18.2.1 standards
• Uncoated finish suitable for dry indoor mechanical applications

Compatibility

Designed as a standard 5/16-18 UNC square head bolt for general mechanical and structural fastening applications where ANSI/ASME B18.2.1 compliant hardware is required.

Installation Notes

Installation is performed by hand-starting the bolt into a pre-tapped or pre-threaded hole, then tightening with an appropriate open-end, box-end, or adjustable wrench. Always inspect threads before installation and ensure the mating threads are clean and free of debris. Do not over-drive. Follow applicable mechanical codes and equipment manufacturer guidelines for proper fastener seating.