Value Collection 451776BR Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION 451776BR is a heavy-duty hex head cap screw sized at 1-1/2-6 UNC thread by 12 inches under the head. Manufactured from Grade 8 steel with a bright, uncoated finish, this fastener is engineered for high-strength bolted connections where tensile load and shear resistance are critical. The partial threading configuration concentrates clamping force at the joint interface rather than along the full shank. It conforms to ASME B18.2.1 dimensional standards and is driven with a 2-1/4-inch hex key or matching hex socket. Machinists, millwrights, and structural fabricators rely on this size for large-frame assemblies and industrial machinery.

This cap screw is suited for heavy industrial, structural, and mechanical assembly applications where Grade 8 proof load and yield strength are required. Typical uses include equipment mounting, jig and fixture construction, structural steel connections, and large-bore mechanical assemblies. The UNC thread form is the standard coarse series for inch-system fasteners, making this screw compatible with a wide range of tapped holes and heavy hex nuts in industrial fabrication environments.

Key Features

• Grade 8 steel construction meets high tensile and yield strength requirements for demanding load-bearing joints
• Partially threaded shank provides a smooth bearing surface that resists shear forces along the grip length
• Bright uncoated finish leaves the fastener ready for field coating, plating, or use as-is in dry interior environments
• Conforms to ASME B18.2.1 for consistent head dimensions, thread tolerance, and interchangeability
• 1-1/2-6 UNC thread is compatible with standard heavy hex nuts and tapped holes in the coarse inch series
• 2-1/4-inch hex drive accommodates standard industrial hex sockets and torque wrenches

Compatibility

Designed as an ASME B18.2.1-compliant inch-series hex head cap screw for use with 1-1/2-6 UNC tapped holes, heavy hex nuts, and structural assemblies requiring Grade 8 fastener strength.

Installation Notes

Installation should be performed by a qualified millwright, ironworker, or mechanical technician familiar with structural bolting procedures. Power down and de-energize or depressurize any equipment before fastener installation or replacement. Use a calibrated torque wrench and a matching 2-1/4-inch hex socket to achieve proper clamp load. Follow the applicable fastener torque table for Grade 8 UNC fasteners and consult AISC or equipment manufacturer guidelines where structural loading is involved.