Value Collection 451815BR Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION 451815BR is a fully threaded hex head cap screw designed for heavy-duty fastening applications. It carries a 1-3/4-5 UNC thread size with a 5-inch length under head, manufactured from Grade 8 steel with a bright uncoated finish. Grade 8 steel is a high-strength fastener material rated for demanding structural and mechanical assembly work. This screw conforms to ASME B18.2.1 dimensional standards and is driven with a 2-5/8 inch hex key. Machinists, millwrights, and maintenance technicians typically install this type of fastener in heavy equipment, structural steel assemblies, and industrial machinery where high tensile strength is required.

This cap screw is suited for industrial and commercial applications requiring large-diameter, high-strength UNC fasteners. Full threading along the 5-inch shank length provides maximum thread engagement across the entire grip length, which is common in through-bolt configurations and thick-plate assemblies. It is applicable wherever ASME B18.2.1 compliant hex head fasteners are specified on engineering drawings or maintenance documentation.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• Fully threaded shank maximizes thread engagement throughout the grip length
• 1-3/4-5 UNC thread form for compatibility with standard inch-series tapped holes
• Bright uncoated finish suitable for applications where surface coating is not required or specified
• Conforms to ASME B18.2.1 dimensional standard
• 2-5/8 inch hex key drive for use with standard heavy-duty wrenching tools

Compatibility

Designed as an OEM-style replacement or direct-use fastener for industrial and mechanical assemblies requiring 1-3/4-5 UNC fully threaded hex head cap screws conforming to ASME B18.2.1.

Installation Notes

Installation should be performed by a qualified millwright, mechanic, or maintenance technician familiar with large-diameter fastener procedures. De-energize and lock out all relevant equipment before removing or installing structural fasteners. Use a calibrated torque wrench rated for large-diameter applications and follow the torque specifications provided in the equipment service documentation. Inspect threads on both the fastener and mating tapped hole for damage or contamination before installation.