Value Collection R52001141 Square Head Bolt 5/16-18 Unc

Product Description

The VALUE COLLECTION R52001141 is a square head bolt with a 5/16-18 UNC thread and a 2-1/2 inch length under head. Made from Grade 2 steel with an uncoated finish, this fastener is designed for general-purpose mechanical and structural applications. The square head profile allows wrench engagement on all four sides, which is useful in tight clearances or when a standard hex head is not practical. This bolt meets ANSI/ASME B18.2.1 dimensional standards. It is commonly installed by maintenance technicians, millwrights, plumbers, and HVAC service professionals working on equipment frames, brackets, and supports.

Square head bolts of this size are used in a wide range of light commercial and residential mechanical installations. Typical applications include equipment mounting, pipe support assemblies, ductwork framing, and general structural connections where a through-bolt or machine-threaded fastener is required. The 5/16-18 UNC coarse thread provides reliable engagement in standard tapped holes or with a matching nut. Minimum order quantity is 100 pieces, sold as a single package unit.

Key Features

• 5/16-18 UNC coarse thread for broad compatibility with standard tapped hardware
• 2-1/2 inch length under head suits medium-depth clamping and through-bolt applications
• Square head profile allows four-sided wrench engagement in confined spaces
• Grade 2 steel construction provides adequate strength for general-purpose mechanical use
• Uncoated finish — suitable for dry or protected indoor installations
• Meets ANSI/ASME B18.2.1 dimensional standards

Compatibility

Designed as a general-purpose square head fastener compatible with any standard 5/16-18 UNC tapped hole or matching nut in mechanical, structural, and equipment-mounting applications.

Installation Notes

Install using an adjustable wrench or appropriately sized open-end wrench on the square head. Always use a compatible 5/16-18 UNC nut and flat washer where load distribution is required. For structural or code-governed assemblies, verify that Grade 2 steel meets the load requirements specified by the applicable standard before installation. Uncoated fasteners should not be used in wet or corrosive environments without additional protection.