Value Collection 451065PR Hex Head Cap Screw 5/16-18 X 8 in

Product Description

The VALUE COLLECTION 451065PR is a Grade 8 steel hex head cap screw designed for high-strength fastening applications in mechanical, structural, and industrial assemblies. Measuring 5/16-18 thread size with an 8-inch length under head, this fastener features a partially threaded shank and an uncoated bright finish. It conforms to ASME B18.2.1 standards and uses a Unified National Coarse (UNC) thread form. The 1/2-inch hex key drive size allows installation with standard hex wrenches or sockets. This type of fastener is commonly installed by millwrights, pipefitters, HVAC mechanics, and general maintenance technicians working on equipment frames, brackets, and structural connections.

This cap screw is suited for residential and commercial applications where a high-strength, partially threaded fastener is required. The Grade 8 material rating makes it appropriate for load-bearing connections subject to vibration or shear stress. Typical applications include equipment mounting, structural framing, and mechanical assembly work where UNC thread engagement is specified. The uncoated bright finish is best used in dry or protected indoor environments where corrosion resistance is not a primary requirement.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 5/16-18 UNC thread form for standard inch-system fastener compatibility
• 8-inch length under head with partial threading along the shank
• Conforms to ASME B18.2.1 dimensional standards
• Bright uncoated finish suitable for dry, protected installations
• 1/2-inch hex drive accommodates standard wrenches and sockets

Compatibility

Designed as a standard inch-system hex head cap screw for use in any application requiring a 5/16-18 UNC thread, Grade 8 steel strength rating, and 8-inch length under head per ASME B18.2.1 specifications.

Installation Notes

Installation should be performed by a qualified technician familiar with fastener grades and torque requirements for the application. Always match the fastener grade to the joint design requirements and verify thread engagement depth before applying load. Use a calibrated torque wrench when a specific clamp load is required by the assembly specification. Do not substitute a lower-grade fastener in a Grade 8-rated joint.