Value Collection 451184BR Hex Head Cap Screw 5/8-11 X 15 in

Product Description

The VALUE COLLECTION 451184BR is a Grade 8 steel hex head cap screw with a 5/8-11 UNC thread and a 15-inch length under head. Grade 8 designation indicates high tensile strength, making this fastener appropriate for heavy-duty bolted joints that must resist shear, tension, and vibration. The bright uncoated finish leaves the steel surface bare, which is standard for applications where coating thickness tolerance is critical or where the installer will apply a separate corrosion-protection treatment. It is partially threaded, meaning the shank provides a smooth grip length before the threads begin, which is important for shear-loaded connections. Machinists, millwrights, and maintenance technicians are the typical installers.

This cap screw suits structural, mechanical, and industrial assembly applications where a high-strength inch-series fastener is required. The long 15-inch length under head makes it suitable for bolting through thick plates, stacked assemblies, flanged connections, or heavy equipment frames. The 5/8-11 UNC thread is one of the most common coarse-thread sizes in inch-series mechanical work, so compatible hex nuts and threaded inserts are widely available. Use in environments with moisture or chemical exposure may require additional corrosion protection given the uncoated finish.

Key Features

• Grade 8 steel construction for high tensile and proof-load strength in demanding bolted joints
• 5/8-11 UNC thread, a standard coarse-thread pitch compatible with common hex nuts and threaded holes
• 15-inch length under head accommodates thick or stacked assemblies requiring extra fastener reach
• Partially threaded shank provides a smooth grip section for shear-loaded connections
• Bright uncoated finish meets ASME B18.2.1 dimensional standards for hex head cap screws
• 15/16-inch hex key size works with standard hex wrenches and sockets

Compatibility

Designed as a standard inch-series hex head cap screw conforming to ASME B18.2.1, compatible with any 5/8-11 UNC threaded nut, tapped hole, or insert meeting the same thread standard.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance technicians using a 15/16-inch wrench or socket. Ensure mating threads are clean and free of debris before assembly, and verify the joint material and clamping stack are rated for Grade 8 fastener loads. De-energize, depressurize, or otherwise isolate any equipment before accessing bolted connections. Follow applicable industry torque specifications for 5/8-11 Grade 8 fasteners as outlined in the relevant engineering documentation for the specific assembly.