Value Collection R52001278 Square Head Bolt 3/4-10 Unc

Product Description

The VALUE COLLECTION R52001278 is a square head bolt manufactured from Grade 2 uncoated steel to ANSI/ASME B18.2.1 standards. It features a 3/4-10 UNC thread size with a 2-1/2 inch length under head. The square head profile provides flat bearing surfaces on all four sides, making it well suited for applications where a wrench or pipe wrench grip is needed or where the head must be set into a square recess to prevent rotation. Plumbers, pipefitters, millwrights, and general tradespeople use this fastener in structural assemblies, pipe flanges, machinery frames, and similar heavy-duty connections.

This bolt is appropriate for residential and commercial applications where UNC coarse-thread fasteners are specified. It fits typical installations in wood framing with timber connectors, steel fabrication, and mechanical equipment mounting where Grade 2 steel strength is sufficient and surface coating is not required. The uncoated finish suits interior or protected installations where corrosion resistance is not a primary concern.

Key Features

• Square head profile provides four flat grip surfaces for wrench or pipe wrench engagement
• 3/4-10 UNC coarse thread for fast assembly and reliable engagement in standard tapped holes
• 2-1/2 inch length under head to suit moderate-depth fastening applications
• Grade 2 steel construction meets ANSI/ASME B18.2.1 dimensional standards
• Uncoated finish keeps the part ready for field painting, plating, or use as-is in protected environments

Compatibility

Designed as a standard UNC coarse-thread square head bolt for use in structural, mechanical, and general industrial assemblies requiring a 3/4-10 thread and 2-1/2 inch length under head per ANSI/ASME B18.2.1.

Installation Notes

Install using a properly sized open-end, box-end, or pipe wrench on the square head. Power down or de-energize any associated equipment before fastener replacement on mechanical assemblies. Follow applicable structural or mechanical codes when specifying Grade 2 fasteners in load-bearing connections, as higher-grade fasteners may be required by design specifications. Apply thread lubricant or anti-seize only when permitted by the application requirements.