Value Collection 581423PR Hex Socket Cap Screw 5/16-18 Unc

Product Description

The Value Collection 581423PR is a hex socket cap screw designed for high-strength mechanical fastening applications. It features a 5/16-18 UNC thread and measures 1.125 inches in length under the head. The screw is fully threaded and driven with a 1/4-inch hex key. Constructed from alloy steel with a black oxide coating, it delivers corrosion resistance and maintains dimensional integrity under load. This fastener meets ASME/ANSI B18.3 and ASTM A574 standards, making it a reliable choice for structural and mechanical assemblies. Machinists, maintenance technicians, and industrial tradespeople commonly specify this type of screw in precision fastening work.

This socket cap screw is suited for general industrial, mechanical, and structural assembly applications where a recessed-drive fastener is required. The 5/16-18 UNC coarse thread is widely used in machine frames, equipment housings, jigs, and fixtures across manufacturing and maintenance environments. The black oxide finish provides mild corrosion resistance in dry or lightly oiled conditions, making it appropriate for indoor mechanical assemblies and enclosed equipment installations.

Key Features

• 5/16-18 UNC coarse thread for broad compatibility with standard tapped holes
• Fully threaded 1.125-inch length under head for maximum thread engagement
• 1/4-inch hex socket drive for use with standard hex keys and socket drivers
• Alloy steel construction meets ASTM A574 high-strength requirements
• Black oxide coating provides mild corrosion resistance and reduces light reflection
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard OEM-style replacement or new-installation hex socket cap screw for any application requiring a 5/16-18 UNC fully threaded fastener with a 1/4-inch hex drive.

Installation Notes

Installation is performed by machinists or maintenance technicians using a 1/4-inch hex key or Allen-head socket driver. Ensure the receiving tapped hole is clean, free of debris, and properly sized for 5/16-18 UNC threads before installation. Apply thread lubricant or thread-locking compound as required by the application specification. Do not exceed the torque rating specified in the applicable equipment service documentation.