Value Collection R57001124 Hex Head Cap Screw 5/16-18

Product Description

The VALUE COLLECTION R57001124 is a fully threaded hex head cap screw sized 5/16-18 x 3-1/2 inches, manufactured from 18-8 stainless steel with an uncoated finish. The 5/16-18 designation refers to a 5/16-inch nominal diameter with 18 threads per inch on a Unified National Coarse (UNC) thread standard. Full threading along the 3-1/2-inch shank length under the head allows engagement across the full grip range, making it suitable for applications where clamping depth varies or where a nut must run the full length. Installers in HVAC, plumbing, electrical, and general mechanical trades reach for 18-8 stainless fasteners where corrosion resistance is required without the cost of 316-grade material.

This fastener is commonly used in light-to-medium duty mechanical assemblies exposed to moisture, mild chemicals, or outdoor environments. Typical applications include equipment panel mounting, bracket attachment, pipe support hardware, and enclosure assembly in both residential and light commercial settings. The UNC thread form is the standard inch-series coarse thread, compatible with the widest range of nuts, inserts, and tapped holes found in trade equipment and structural components.

Key Features

• 5/16-18 UNC thread form for broad compatibility with standard inch-series hardware
• 3-1/2-inch length under head, fully threaded from tip to bearing surface
• 18-8 stainless steel construction provides corrosion resistance in wet or outdoor environments
• Uncoated finish — no zinc, cadmium, or plating to interfere with stainless-on-stainless galling precautions
• Hex head drive accepts standard 1/2-inch wrench or socket

Compatibility

Designed as a standard inch-series hex head cap screw for use with any 5/16-18 UNC-tapped hole, nut, or threaded insert in trade equipment, structural brackets, and mechanical assemblies.

Installation Notes

Install using an appropriately sized wrench or socket driver; power-down or de-energize any equipment before fastening components within electrical enclosures. When threading stainless steel fasteners into stainless tapped holes, apply an anti-seize compound to reduce the risk of galling. Do not exceed the mechanical torque limits appropriate for 5/16-18 stainless fasteners as specified by the equipment manufacturer or applicable codes.