Value Collection 451079PR Hex Head Cap Screw 3/8-16 X 10 in

Product Description

The VALUE COLLECTION 451079PR is a Grade 8 steel hex head cap screw with a 3/8-16 UNC thread and a 10-inch length under head. It is partially threaded and left uncoated (bright finish), conforming to ASME B18.2.1 dimensional standards. Grade 8 steel provides high tensile strength, making this fastener suitable for heavy-duty mechanical and structural assemblies. A 9/16-inch hex key size is required for installation and removal. This screw is installed by millwrights, maintenance technicians, and mechanical contractors working on equipment frames, machinery mounts, and structural steel connections.

This cap screw is used in industrial and commercial applications requiring a long, partially threaded fastener with high clamping force. Typical scenarios include bolting together thick steel sections, mounting heavy machinery bases, and securing structural assemblies where a full-thread grip length would be inadequate. The partial thread design keeps the shank smooth through the clamped material, concentrating thread engagement at the nut end for improved load distribution.

Key Features

• Grade 8 steel construction provides high tensile and proof-load strength for heavy-duty fastening
• Partial threading with smooth shank body for improved shear resistance through clamped material
• 3/8-16 UNC thread form for broad nut and tapped-hole compatibility
• Bright uncoated finish — suitable for dry indoor applications or where a coating would interfere with tolerances
• Conforms to ASME B18.2.1 for dimensional accuracy and interchangeability
• 9/16-inch hex drive reduces cam-out risk compared to socket or torx alternatives on large fasteners

Compatibility

Designed for use with standard 3/8-16 UNC hex nuts, flat washers, and lock washers in inch-series fastener assemblies per ASME B18.2.1.

Installation Notes

Installation is performed by qualified mechanical, maintenance, or structural trade professionals. Verify that mating threads and tapped holes are clean and free of debris before assembly. Use a calibrated torque wrench with a 9/16-inch socket and follow the torque specifications provided by the equipment or structure manufacturer for Grade 8 fasteners of this thread size. Do not substitute Grade 5 or lower-rated hardware in applications specifying Grade 8.