Value Collection 451190BR Hex Head Cap Screw 5/8-18 X 11 in

Product Description

The VALUE COLLECTION 451190BR is a Grade 8 steel hex head cap screw with a 5/8-18 UNF thread and an 11-inch length under the head. Partially threaded and left with a bright, uncoated finish, this fastener is built for high-strength bolted connections where a hardened, fine-thread screw is required. Grade 8 steel provides significantly higher tensile strength than standard grades, making it suitable for demanding structural and mechanical assemblies. It conforms to ASME B18.2.1, the standard governing inch-series hex head cap screw dimensions and tolerances. A 15/16-inch hex key size is used for installation and removal.

This cap screw is used in heavy-duty mechanical, industrial, and equipment assembly applications where fine-thread engagement and high-clamp-load retention are priorities. The partially threaded shank provides an unthreaded grip section useful for joints requiring precise shear load transfer. Typical install scenarios include machinery frames, equipment mounting, and structural brackets across commercial and industrial settings. Licensed mechanics, millwrights, and maintenance technicians are the primary installers.

Key Features

• Grade 8 steel construction for high tensile strength in demanding bolted joints
• 5/8-18 UNF fine-thread profile for improved thread engagement and torque retention
• Partially threaded shank allows an unthreaded grip section for shear-load applications
• Bright, uncoated finish — no coating thickness to account for in fit-critical applications
• Conforms to ASME B18.2.1 for consistent dimensional accuracy
• 15/16-inch hex drive size compatible with standard hex wrenches and impact sockets

Compatibility

Designed as a standard inch-series hex head cap screw for use in any application requiring a 5/8-18 UNF Grade 8 fastener with an 11-inch length under the head per ASME B18.2.1.

Installation Notes

Installation requires a 15/16-inch hex wrench or socket. Always verify mating thread condition and nut or tapped-hole grade before assembly, as Grade 8 fasteners require compatible high-strength hardware to achieve rated clamp load. De-energize and lock out any powered equipment before accessing fastened assemblies. Follow applicable torque specifications from the equipment manufacturer or a recognized fastener engineering reference for the specific joint material and lubrication condition.