Value Collection D39461 Hex Head Cap Screw 5/8-18 X 6 in Grade 8

Product Description

The VALUE COLLECTION D39461 is a partially threaded hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. Manufactured from Grade 8 steel with a zinc yellow dichromate finish, this fastener delivers superior tensile strength and corrosion resistance compared to lower-grade alternatives. The 5/8-18 UNF thread profile and 6-inch length under head make it suited for applications requiring a fine-thread engagement with extended grip length. Conforms to ASME B18.2.1 standards. Installed with a standard hex wrench or impact driver.

This cap screw is commonly used in heavy equipment maintenance, machinery assembly, and structural bolting where Grade 8 tensile requirements and fine-thread engagement are specified. The partial threading provides a smooth shank section for shear-load applications and precise clamping. Typical installers include millwrights, maintenance mechanics, and industrial technicians working on presses, conveyors, agricultural equipment, and similar high-load assemblies. The zinc yellow dichromate finish provides a degree of corrosion protection suitable for indoor and light-duty outdoor environments.

Key Features

• Grade 8 steel construction for high tensile and proof-load strength
• 5/8-18 UNF fine thread for precise engagement and vibration resistance
• 6-inch length under head with partial threading for shear-load capability
• Zinc yellow dichromate finish for corrosion and oxidation resistance
• Conforms to ASME B18.2.1 dimensional standards
• Inch measurement system for compatibility with standard SAE tooling

Compatibility

Designed as a standard ASME B18.2.1 hex head cap screw for use in applications specifying a 5/8-18 UNF Grade 8 partially threaded fastener with a 6-inch length under head.

Installation Notes

Installation should be performed by qualified mechanics or technicians familiar with torque specifications for Grade 8 fasteners. Always verify thread engagement depth and mating material before installation. Apply thread lubrication or anti-seize compound only if specified by the assembly procedure, as it affects torque-clamp load relationships. De-energize or lock out any equipment before fastener service in accordance with applicable OSHA lockout/tagout procedures.