Value Collection R52001179 Square Head Bolt 3/8-16 Unc

Product Description

The VALUE COLLECTION R52001179 is a square head bolt designed for general-purpose fastening in mechanical and structural assemblies. It features a 3/8-16 UNC thread specification and a 2-1/2 inch length under head, making it suited for applications that require a wrench-gripping bolt head with high torque transfer. Constructed from Grade 2 steel with an uncoated finish, this bolt delivers standard tensile strength for low- to medium-stress installations. Machinists, millwrights, pipefitters, and general contractors commonly use square head fasteners where pipe fittings, flanges, or timber connections call for this traditional bolt profile.

This bolt is appropriate for use in residential and light commercial construction, equipment fabrication, and maintenance applications. The square head profile seats firmly against square-hole fittings and timber framing, reducing the tendency to rotate during installation. It is a practical choice wherever a traditional square head fastener is specified by plan, code, or original equipment design. Each bolt is sold individually, with a minimum order quantity of 50 pieces per order.

Key Features

• 3/8-16 UNC thread form for standard inch-series fastener compatibility
• 2-1/2 inch length under head suits medium-depth clamping applications
• Square head profile allows wrench engagement and resists spinning in square-hole applications
• Grade 2 steel construction meets standard tensile requirements for general-purpose use
• Uncoated finish suitable for indoor, dry, or subsequently finished installations
• Lightweight at approximately 0.086 pounds per bolt

Compatibility

Designed as a general-purpose replacement or service fastener for assemblies specifying a 3/8-16 UNC square head bolt with a 2-1/2 inch length under head in Grade 2 uncoated steel.

Installation Notes

Square head bolts are typically installed by machinists, ironworkers, or general contractors using an open-end or adjustable wrench. Ensure mating threads are clean and free of debris before installation. Apply fastener torque in accordance with applicable Grade 2 torque specifications from the relevant ASME or AISC standard for the assembly. Do not use impact tools at full power on Grade 2 fasteners, as this can exceed the material yield strength.