Value Collection 451166BR Hex Head Cap Screw 5/8-11x12 G8

Product Description

The VALUE COLLECTION 451166BR is a Grade 8 steel hex head cap screw in a 5/8-11 UNC thread size with a 12-inch length under head. It is partially threaded and carries an uncoated, bright finish. Designed to meet ASME B18.2.1 standards, this fastener delivers the high tensile strength required for heavy-duty structural and mechanical assemblies. It is installed using a 15/16-inch hex key or wrench. Trades professionals across industrial, mechanical, and construction applications rely on Grade 8 hardware when joint integrity under load is critical.

This cap screw suits applications that demand a high-strength inch-series fastener in larger diameter and longer length configurations. Typical install scenarios include steel fabrication, heavy equipment assembly, structural bolting, and mechanical component mounting where partial threading is preferred to allow for proper clamping in thicker material stacks. The bright, uncoated finish is appropriate for dry or protected interior environments where corrosion exposure is limited.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 5/8-11 UNC thread size with 12-inch length under head for deep fastening applications
• Partially threaded shank allows full clamping force across thick material stacks
• Meets ASME B18.2.1 dimensional standards for inch-series hex head cap screws
• Bright, uncoated finish suitable for controlled environments
• 15/16-inch hex drive for standard wrench and socket tooling

Compatibility

Designed as an OEM-style replacement or standard-service fastener for applications requiring a 5/8-11 UNC Grade 8 hex head cap screw with a 12-inch length under head per ASME B18.2.1.

Installation Notes

Installation is performed by mechanical trades using standard socket or open-end wrenches sized at 15/16 inches. Always de-energize or fully isolate any equipment being disassembled before removing or replacing structural fasteners. Follow applicable torque guidelines per the joint design specification for Grade 8 hardware. Inspect threads for damage before installation and ensure mating threads are clean and free of debris.