Value Collection HCI803104001NA-100BX Hex Head Cap Screw

Product Description

The VALUE COLLECTION HCI803104001NA-100BX is a fully threaded hex head cap screw designed for high-strength fastening in industrial, mechanical, and structural applications. Manufactured from Grade 8 steel with a zinc yellow dichromate finish, this fastener delivers superior tensile strength compared to lower-grade alternatives while providing corrosion resistance suitable for demanding environments. The 5/16-18 UNC thread profile and 4-inch length under head make it well suited for applications requiring deep thread engagement and a secure, bolt-on connection. It conforms to ASME B18.2.1 and SAE J429 standards, ensuring dimensional consistency and material performance verification.

This cap screw is appropriate for use in general industrial assembly, machinery mounting, fabricated steel structures, and equipment maintenance work. The fully threaded shank maximizes thread engagement across the full length under head, making it a preferred choice when clamping force must be distributed along the entire fastener body. Electricians, millwrights, pipefitters, and general contractors working on equipment anchoring, panel mounting, or structural steel connections will encounter this fastener type in standard service scenarios.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• Zinc yellow dichromate finish provides corrosion resistance in moderate-exposure environments
• Fully threaded shank for maximum thread engagement along the entire 4-inch length
• 5/16-18 UNC thread standard ensures compatibility with standard inch-series nuts and tapped holes
• Meets ASME B18.2.1 and SAE J429 dimensional and material standards
• 1/2-inch hex key size for use with standard socket or wrench drive tooling

Compatibility

Designed for use with standard 5/16-18 UNC inch-series hex nuts, lock nuts, and tapped holes conforming to ASME B18.2.2 or equivalent UNC thread specifications.

Installation Notes

Installation should be performed by a qualified mechanic, millwright, or maintenance technician familiar with fastener torque requirements for Grade 8 hardware. Always use the appropriate 1/2-inch hex socket or open-end wrench and apply torque values per published Grade 8 fastener torque charts for the 5/16-18 thread size. Ensure mating threads and bearing surfaces are clean and free of debris before installation. Never reuse fasteners that show signs of thread damage, galling, or deformation.