Value Collection 307120PR Hex Socket Cap Screw 5/16-18 Unc

Product Description

The VALUE COLLECTION 307120PR is a hex socket cap screw designed for high-strength fastening applications in mechanical, industrial, and trade assembly work. Built from alloy steel with a black oxide finish, this screw meets ASTM A574 standards, making it suitable for demanding clamping and structural fastening tasks. The 5/16-18 UNC thread size and 3-inch length under head accommodate a range of material thicknesses. Drive engagement is achieved with a 7/32-inch hex key. The black oxide coating provides moderate corrosion resistance and reduces light reflection in precision assemblies. Installation is straightforward for machinists, maintenance technicians, and mechanical contractors working in both shop and field environments.

This cap screw is used in general mechanical assembly, equipment maintenance, and fabrication applications where a recessed drive and high clamp load are required. The partially threaded shank provides a smooth bearing surface through clearance holes, making it well suited for bolted joints where shear load distribution matters. It is commonly installed in metal-to-metal fastening scenarios across industrial, HVAC equipment, and structural sub-assembly work.

Key Features

• 5/16-18 UNC thread form for standard inch-series fastening
• 3-inch length under head with partial threading for shear-load applications
• 7/32-inch hex socket drive for use with standard Allen keys or hex bit drivers
• Alloy steel construction meets ASTM A574 high-strength cap screw standard
• Black oxide coating provides moderate corrosion resistance and a low-glare finish
• Minimum order quantity of 10 units per order

Compatibility

Designed as a standard 5/16-18 UNC hex socket cap screw compatible with any application requiring ASTM A574 alloy steel fasteners with a 3-inch length under head and partial threading.

Installation Notes

Installation is typically performed by machinists, millwrights, or mechanical technicians using a 7/32-inch hex key or socket bit. De-energize and lock out any equipment before fastener replacement or assembly work. Apply fastener torque per the joint design specification for 5/16-18 ASTM A574 grade fasteners. Inspect threads for damage before installation and do not use an impact driver without a torque-limiting attachment.