Value Collection C89472 Hex Head Cap Screw 1/4-28 X 4 in Grade 8

Product Description

The VALUE COLLECTION C89472 is a partially threaded hex head cap screw designed for high-strength fastening applications where precise clamping and reliable torque retention are required. Built to ASME B18.2.1 standards, this screw uses a 1/4-28 UNF thread form and measures 4 inches under the head, providing generous grip length for through-bolted assemblies. Manufactured from Grade 8 steel with a zinc yellow dichromate finish, it delivers the hardness and corrosion resistance demanded by mechanical, industrial, and structural installations. This package contains 50 screws, making it well suited for production line work, maintenance shops, and field service kits.

The C89472 is appropriate for use in mechanical assemblies, equipment frames, and structural connections where a fine-thread 1/4-28 fastener is specified. The partial threading leaves a smooth shank section under the head, which helps locate mating parts and reduces stress concentration at the shank-to-thread transition. Licensed mechanics, millwrights, pipefitters, and general industrial technicians regularly work with Grade 8 fasteners of this profile in both OEM production and field-replacement contexts.

Key Features

• Grade 8 steel construction provides high tensile and proof-load strength for demanding fastening applications
• 1/4-28 UNF fine-thread form offers tighter thread engagement and better resistance to loosening under vibration compared to coarse-thread variants
• Zinc yellow dichromate finish provides corrosion protection and is visually distinguishable from lower-grade fasteners on the workbench
• Partial threading retains a smooth shank for accurate part alignment and improved shear strength
• Conforms to ASME B18.2.1 dimensional standards for consistent fit across industry-standard tooling
• Sold in a 50-piece package to support both single-job use and stocking applications

Compatibility

Designed as a standard ASME B18.2.1 inch-series hex head cap screw suitable for any application specifying a 1/4-28 UNF partially threaded fastener in Grade 8 steel.

Installation Notes

Installation should be performed by qualified mechanical or maintenance personnel using a properly sized hex wrench or socket driver. Fastener holes should be clean, free of debris, and sized to the appropriate tolerance for 1/4-28 UNF threads before driving. Always verify the required fastener grade against the engineering specification for the assembly before substitution. Do not exceed the rated torque specification for the joint as defined by the equipment manufacturer or applicable industry standard.