Value Collection 451178BR Hex Cap Screw 5/8-11 X 14 in Grade 8

Product Description

The VALUE COLLECTION 451178BR is a Grade 8 steel hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. Measuring 5/8-11 thread size with a 14-inch length under head, this screw features Unified National Coarse (UNC) threading and is partially threaded along its shank. The bright, uncoated finish indicates no additional corrosion treatment, making it suitable for dry or controlled environments. Manufactured to ASME B18.2.1 standards, it meets dimensional tolerances required for critical bolted joints. The wrench drive requires a 15/16-inch hex key or socket for installation.

This cap screw is commonly used in heavy equipment fabrication, structural steel connections, machinery assembly, and industrial maintenance applications. Its Grade 8 rating indicates a high-tensile-strength fastener appropriate for joints requiring elevated clamping force. Partial threading is typical for longer-length bolts where a smooth shank provides a bearing surface and resists shear loads between joined materials. Machinists, millwrights, ironworkers, and maintenance technicians regularly work with fasteners of this specification.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 5/8-11 UNC thread size with 14-inch length under head
• Partially threaded shank for shear-load resistance
• Bright/uncoated finish, dimensionally per ASME B18.2.1
• 15/16-inch hex drive for standard socket or wrench installation

Compatibility

Designed as a standard inch-series hex head cap screw for use with 5/8-11 UNC threaded nuts, tapped holes, and bolted assemblies requiring Grade 8 fastener specification per ASME B18.2.1.

Installation Notes

Installation should be performed by a qualified tradesperson familiar with fastener torque specifications for Grade 8 hardware at 5/8-inch diameter. Use a calibrated torque wrench to achieve the required clamp load per applicable engineering documentation or recognized fastener torque charts. Ensure mating threads are clean and free of debris before assembly. Do not exceed the rated proof load of the fastener or substitute with lower-grade hardware.