Value Collection 451070BR Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION 451070BR is a heavy-duty hex head cap screw designed for high-strength bolted connections in structural and mechanical assemblies. It carries a 1-1/2-6 UNC thread size with a 9-inch length under head and is partially threaded, allowing the unthreaded shank to bear shear loads in close-tolerance applications. Manufactured from Grade 8 steel with a bright uncoated finish, this fastener meets ASME B18.2.1 dimensional standards. It weighs 5.33 pounds and requires a 2-1/4-inch hex key or wrench for installation. Machinists, millwrights, structural ironworkers, and maintenance mechanics use this size in heavy fabrication, press frames, equipment mounting, and similar demanding applications.

This cap screw is suited for high-load bolted joints in industrial machinery, structural steel connections, and heavy equipment assemblies where Grade 8 tensile strength is required. The 1-1/2-6 UNC thread form is a coarse-pitch inch-series thread common in large-diameter structural fastener applications. The partially threaded shank provides a grip length that resists lateral forces in shear-critical joints. This size is typically specified on fabrication drawings and equipment service manuals for mainframe, base plate, and bearing housing connections.

Key Features

• Grade 8 steel construction meets high-tensile-strength requirements for structural and mechanical fastening
• 1-1/2-6 UNC coarse thread for reliable engagement in standard tapped holes and nuts
• Partially threaded shank provides a bearing surface to resist shear loads
• Bright uncoated finish suitable for dry indoor applications or where secondary coating will be applied
• Conforms to ASME B18.2.1 dimensional standard for consistent fit and interchangeability
• 2-1/4-inch hex drive accommodates standard large-capacity impact wrenches and torque wrenches

Compatibility

Designed as a standard inch-series hex head cap screw for use with 1-1/2-6 UNC tapped holes or heavy hex nuts in structural, industrial, and mechanical assemblies requiring Grade 8 fastener specifications.

Installation Notes

Installation should be performed by qualified millwrights, ironworkers, or mechanical maintenance technicians familiar with high-strength fastener torque requirements. De-energize and lock out all equipment before replacing structural fasteners in machinery. Use a calibrated torque wrench to achieve the specified clamp load per the equipment manufacturer or applicable engineering specification. Do not impact-drive Grade 8 fasteners to final torque without verifying proper seating and thread engagement.