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The VALUE COLLECTION R52001251 is a square head bolt designed for general fastening applications where a traditional hex head is not required or preferred. The square head profile allows for easy gripping with a pipe wrench or adjustable wrench, making it a practical choice in structural, mechanical, and fabrication work. This bolt features a 5/8-11 UNC thread size, a 2-inch length under head, and is manufactured from Grade 2 steel in an uncoated finish. It conforms to ANSI/ASME B18.2.1 dimensional standards. Installers in mechanical, construction, and industrial trades reach for this fastener when square drive geometry offers a workflow or access advantage.
This bolt is suited for light to moderate structural and mechanical assemblies in residential and commercial settings. The uncoated steel finish makes it appropriate for indoor or dry-environment applications where corrosion resistance is not a primary requirement. The 5/8-11 UNC thread is a coarse thread series, which seats quickly and resists cross-threading in field conditions. It is commonly used in equipment mounting, framing connections, and general assembly where square head geometry is specified or preferred by the installer.
Designed as a general-purpose square head fastener for use with standard 5/8-11 UNC threaded nuts and tapped holes conforming to ANSI/ASME B18.2.1 specifications.
Installation is performed by mechanical, construction, or industrial trades using standard hand or power tools capable of engaging a square head profile. Always match the nut grade and thread standard to the bolt for proper load transfer. Verify that the joint material and bolt grade are appropriate for the applied load before final torque. Do not use uncoated steel fasteners in wet, outdoor, or corrosive environments without appropriate protective measures.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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