Value Collection MP39304 1/4-28 X 1 in Grade 8 Hex Cap Screw

Product Description

The VALUE COLLECTION MP39304 is a fully threaded hex head cap screw designed for high-strength fastening applications in mechanical, industrial, and trade assembly work. 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 1/4-28 UNF thread designation indicates a fine-thread pitch, which provides greater thread engagement and improved resistance to loosening under vibration. Each screw measures 1 inch in length under the head. This SKU is sold in a package of 50 pieces, making it suitable for batch repairs, equipment assembly, or stocking a service van.

This cap screw is appropriate for use in automotive, HVAC equipment mounting, electrical enclosure assembly, pump and compressor hardware, and other mechanical applications where a high-strength fine-thread fastener is required. The zinc yellow dichromate coating provides moderate corrosion protection and is commonly specified in both shop fabrication and field service environments. The fully threaded shank ensures thread engagement along the entire usable length, which is preferred in thin-material or close-tolerance applications.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 1/4-28 UNF fine thread for improved vibration resistance and thread engagement
• Fully threaded shank — no unthreaded grip section
• Zinc yellow dichromate finish provides corrosion and oxidation resistance
• Meets ASME B18.2.1 and SAE J429 standards
• Sold in a 50-piece package for efficient restocking

Compatibility

Designed as a standard 1/4-28 UNF hex head cap screw for use in any application requiring an inch-series fine-thread fastener conforming to ASME B18.2.1 and SAE J429 specifications.

Installation Notes

Installation is performed by mechanics, millwrights, HVAC technicians, electricians, and other trade professionals using standard hex wrenches or sockets. De-energize all electrical circuits and relieve system pressure before replacing fasteners on live equipment. Confirm thread engagement and do not overtighten — apply torque values per the equipment manufacturer's specifications for Grade 8 hardware. Inspect mating threads for damage or corrosion before installation.