Value Collection 451125BR Hex Head Cap Screw 5/8-11 X 8.5 in

Product Description

The VALUE COLLECTION 451125BR is a Grade 8 hex head cap screw sized 5/8-11 x 8-1/2 inches, designed for high-strength bolted connections in demanding structural and mechanical applications. The screw features a partially threaded shank and an uncoated bright finish, conforming to ASME B18.2.1 dimensional standards. With a Unified National Coarse (UNC) thread form at 5/8-11, it delivers reliable clamping force and thread engagement in steel fabrication, heavy equipment assembly, and industrial maintenance work. The fastener weighs 0.78 pounds and accepts a 5/16-inch hex key for installation or removal in tight clearances.

This cap screw is suited for structural bolting, machinery assembly, and fabrication work where high tensile strength and dimensional consistency are required. Grade 8 steel is commonly specified in applications subject to heavy loads, vibration, or dynamic stress, including agricultural equipment, construction machinery, and heavy-duty frames. The partially threaded shank provides a smooth bearing surface along the grip length, which is beneficial when clamping multiple members without thread engagement in the joint interface. Installation is performed by licensed mechanics, millwrights, ironworkers, or experienced maintenance technicians.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 5/8-11 UNC thread form, partially threaded shank
• 8-1/2 inch length measured under head per ASME B18.2.1
• Bright uncoated finish suitable for environments where coating is not required or specified
• Accepts a 5/16-inch hex key for installation or removal
• Meets ASME B18.2.1 dimensional standard for inch-series hex cap screws

Compatibility

Designed as a standard inch-series hex head cap screw for use with 5/8-11 UNC tapped holes or compatible nuts in structural, mechanical, and fabrication assemblies requiring Grade 8 fastener specifications.

Installation Notes

Install using an appropriate torque wrench calibrated for Grade 8 fasteners; consult the equipment manufacturer or applicable structural specification for required torque values, as none are specified for this SKU. Ensure mating threads are clean, free of debris, and of matching UNC thread form before installation. A hardened flat washer is typically used under the head to protect the bearing surface. Follow applicable codes and standards, including AISC guidelines for structural applications where relevant.