Value Collection 451069BR Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION 451069BR is a heavy-duty hex head cap screw engineered for high-stress structural and mechanical fastening applications. It carries a 1-1/2-6 UNC thread size with an 8-inch length under head, and is manufactured from Grade 8 steel with a bright, uncoated finish. The partial threading leaves a smooth shank section between the head and the threaded portion, which reduces stress concentration in bolted joints and allows the shank to bear shear loads. At 4.87 pounds, this is a substantial fastener suited for industrial and heavy equipment assembly work where fastener integrity under load is critical.

This cap screw is used in heavy industrial, construction, and OEM machinery applications where UNC coarse-thread fasteners are specified. The Grade 8 designation indicates a minimum tensile strength well above that of lower-grade fasteners, making it appropriate for structural connections, large equipment frames, press assemblies, and similar load-bearing installations. Machinists, millwrights, ironworkers, and field maintenance technicians working on heavy-duty equipment are the primary installers. The 2-1/4-inch hex key drive size requires appropriate wrenching tooling for proper installation torque.

Key Features

• Grade 8 steel construction for high-tensile-strength bolted connections
• 1-1/2-6 UNC coarse thread form for reliable engagement in standard inch-system tapped holes
• Partially threaded shank reduces stress concentration and handles shear loading
• Bright, uncoated finish maintains dimensional accuracy per ASME B18.2.1
• 2-1/4-inch hex drive accommodates standard heavy-duty wrenching tools
• Conforms to ASME B18.2.1 dimensional standards for interchangeability and quality assurance

Compatibility

Designed for use in any application specifying a 1-1/2-6 UNC hex head cap screw to ASME B18.2.1 dimensional standards in inch-measurement systems.

Installation Notes

Installation should be performed by a qualified millwright, machinist, or maintenance technician using a properly rated torque wrench and a 2-1/4-inch hex socket or open-end wrench. Always verify that the mating tapped hole or nut is rated for Grade 8 loading before assembly, as mismatched grades can cause joint failure. Inspect threads for damage before installation and do not apply lubricants or thread-locking compounds unless specified by the equipment manufacturer, as these alter the torque-tension relationship. Follow applicable ASME or OEM torque specifications for the joint design.