Value Collection 451078PR Hex Head Cap Screw 3/8-16 X 9 in

Product Description

The VALUE COLLECTION 451078PR is a Grade 8 steel hex head cap screw with a 3/8-16 UNC thread and a 9-inch length under head. It features partial threading along the shank, making it suited for applications where a smooth bearing surface or clamping grip is required. Manufactured to ASME B18.2.1 standards, it carries a bright, uncoated finish. The hex drive measures 9/16 inches across flats. Grade 8 steel construction provides high tensile strength for demanding fastening applications in mechanical, structural, and industrial assemblies. This fastener is installed by maintenance technicians, millwrights, and field mechanics working across a wide range of trade and industrial environments.

The 451078PR is suited for heavy-duty bolted connections in mechanical assemblies, equipment frames, structural brackets, and industrial machinery where high-strength fasteners are specified. The partially threaded shank allows for precise clamping of thicker material stacks without thread engagement through the full grip length. The uncoated finish makes it appropriate for assemblies where a specific coating or plating will be applied post-assembly, or where bare steel is acceptable per the application specification.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 3/8-16 UNC thread with partial threading for clean grip-length clamping
• 9-inch length under head accommodates thick material stacks and long-grip applications
• Meets ASME B18.2.1 dimensional standards for inch-series hex head cap screws
• Bright, uncoated finish suitable for secondary coating or bare-steel applications
• 9/16-inch hex key size for standard wrench engagement

Compatibility

Designed as a standard inch-series hex head cap screw compatible with 3/8-16 UNC threaded holes in mechanical assemblies, structural connections, and industrial equipment per ASME B18.2.1 specifications.

Installation Notes

Install using a 9/16-inch open-end, box, or socket wrench. De-energize and lock out any equipment before fastener service per applicable LOTO procedures. Verify that the mating threaded hole or nut is rated for Grade 8 load requirements before assembly. Do not substitute a lower-grade fastener in a Grade 8-specified joint.