Value Collection 39205 Hex Head Cap Screw 7/8-9 X 6 in Grade 8

Product Description

The VALUE COLLECTION 39205 is a partially threaded hex head cap screw designed for heavy-duty fastening applications. Manufactured from Grade 8 steel with a zinc yellow dichromate finish, this fastener delivers high tensile strength and corrosion resistance suitable for demanding mechanical assemblies. The 7/8-9 UNC thread profile and 6-inch length under head make it appropriate for thick structural connections where full-thread engagement is not required. It meets ASME B18.2.1 and SAE J429 dimensional and mechanical standards. Machinists, millwrights, maintenance technicians, and industrial mechanics install this type of fastener in fabrication, equipment repair, and structural assembly work.

This cap screw is used in industrial, commercial, and heavy equipment applications where high-strength steel fasteners are specified. The partial thread configuration is suited for joints requiring a grip length with an unthreaded shank section to bear shear loads or align mating parts. Common installation scenarios include machine bases, structural steel connections, agricultural equipment, and general heavy fabrication where Grade 8 hardware is called out by engineering spec or maintenance procedure.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• Zinc yellow dichromate finish provides corrosion and oxidation resistance
• Partially threaded shank suitable for shear-load and grip-length applications
• 7/8-9 UNC thread standard for broad compatibility with inch-system hardware
• Meets ASME B18.2.1 and SAE J429 dimensional and mechanical standards
• Hex head drive for use with standard wrenches and impact tools

Compatibility

Designed as a standard inch-system hex head cap screw for use with 7/8-9 UNC threaded nuts, tapped holes, and fastener assemblies calling out Grade 8 hardware per ASME B18.2.1 and SAE J429 specifications.

Installation Notes

Installation is performed by millwrights, maintenance mechanics, or qualified technicians using standard open-end, box, or socket wrenches and impact tools rated for the fastener size. Always verify thread engagement depth and mating hardware grade before assembly. De-energize and lock out any equipment before replacing fasteners in machinery per applicable OSHA lockout/tagout procedures. Do not mix Grade 8 fasteners with lower-grade nuts or tapped holes not rated for the corresponding load.