Value Collection R52001228 Square Head Bolt 1/2-13 Unc

Product Description

The VALUE COLLECTION R52001228 is a partially threaded square head bolt designed for structural fastening applications where a wrench-bearing head with high torque resistance is required. Manufactured from Grade 2 uncoated steel, this bolt features a 1/2-13 UNC thread and measures 3-1/2 inches in length under the head. The square head profile allows for positive wrench engagement in tight or high-torque installations. It meets ANSI/ASME B18.2.1 dimensional standards and is supplied uncoated. Licensed tradespeople and maintenance technicians working in mechanical, construction, and industrial settings routinely specify this fastener type for fixed structural connections.

This bolt is suited for general mechanical assembly, steel fabrication, wood-to-steel connections, and equipment mounting where a square head profile provides installation advantages. The partially threaded shank maintains a smooth bearing surface along the unthreaded portion, which helps resist shear loads at the joint. Typical applications include framing connections, machinery bases, and utility structure assembly. This fastener is sold with a minimum order quantity of 25 pieces per order.

Key Features

• 1/2-13 UNC right-hand thread for standard nut and tapped-hole compatibility
• Partially threaded shank provides a smooth shear-bearing surface
• Square head profile allows firm wrench engagement in high-torque applications
• Grade 2 steel construction meets ANSI/ASME B18.2.1 dimensional standards
• Uncoated finish suitable for dry indoor environments or where field coating will be applied

Compatibility

Designed as a standard-dimension ANSI/ASME B18.2.1 square head bolt for use with 1/2-13 UNC hex nuts, square nuts, and tapped holes in structural and mechanical fastening applications.

Installation Notes

Installation is typically performed by millwrights, ironworkers, or maintenance mechanics using standard open-end or box wrenches sized for a 1/2-13 square head bolt. Verify that the mating nut or tapped hole thread specification matches 1/2-13 UNC before installation. Torque to joint requirements based on Grade 2 steel fastener specifications per applicable engineering or project standards. Uncoated steel is not rated for outdoor or corrosive environments without additional protective treatment.