Value Collection 451063BR Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION 451063BR is a heavy-duty hex head cap screw designed for high-strength fastening applications in structural, mechanical, and industrial assemblies. With a 1-1/2-6 UNC thread and a 5-1/2-inch length under head, this fastener is built from Grade 8 steel and left uncoated with a bright finish. It is partially threaded, conforming to ASME B18.2.1 dimensional standards. Weighing 3.65 pounds, it is sized for large-scale bolted connections where tensile and shear strength requirements are critical. Machinists, millwrights, and structural ironworkers are the typical installers.

This cap screw is suited for heavy equipment assembly, structural steel fabrication, agricultural machinery, and industrial maintenance applications where Grade 8 strength is required. The 1-1/2-6 UNC coarse thread pitch is standard in large-diameter fastener applications and mates with corresponding Grade 8 nuts and threaded assemblies. Partial threading is appropriate for through-bolt installations where grip length and shank clearance are necessary for proper joint clamping.

Key Features

• Grade 8 steel construction for high tensile strength in demanding fastening applications
• 1-1/2-6 UNC coarse thread for compatibility with standard large-diameter threaded hardware
• 5-1/2-inch length under head accommodates thick structural members and stacked assemblies
• Partially threaded shank provides proper grip length and bearing surface for bolted joints
• Bright uncoated finish suitable for use with supplemental coatings or in controlled environments
• Conforms to ASME B18.2.1 for dimensional consistency and interchangeability

Compatibility

Designed as a standard-dimension hex head cap screw per ASME B18.2.1, compatible with Grade 8 heavy hex nuts and hardened washers in 1-1/2-6 UNC thread configurations.

Installation Notes

Installation should be performed by qualified millwrights, ironworkers, or maintenance mechanics familiar with high-strength bolted joint procedures. Always use a calibrated torque wrench and apply the correct torque per the applicable structural or equipment specification. Pair with hardened flat washers and Grade 8 nuts to maintain joint integrity. Do not reuse fasteners that have been subjected to yield-level loading or visible deformation.