Value Collection 203116 Hex Head Cap Screw 5/16-18 Unc

Product Description

The VALUE COLLECTION 203116 is a hex head cap screw designed for fastening applications that require corrosion resistance in wet, chemical, or marine environments. Machined to a 5/16-18 thread size with a 1-1/4 inch length under head, this fastener follows the Unified National Coarse (UNC) thread standard. The 316 stainless steel construction provides superior resistance to chloride pitting and oxidation compared to standard 304 stainless, making it a common choice in HVAC, plumbing, pool equipment, and other trade applications where moisture exposure is a regular service condition. The 1/2 inch hex drive accepts standard wrenches and sockets.

This fastener is suited for residential and commercial trade installations where stainless hardware is specified or required. Common applications include mounting pool equipment panels, securing plumbing brackets, assembling HVAC enclosures, and general mechanical fastening in corrosive or high-humidity environments. Licensed technicians and service professionals working in coastal, chemical, or outdoor environments routinely specify 316 stainless fasteners over zinc or plated alternatives for extended service life.

Key Features

• 316 stainless steel construction resists chloride corrosion, oxidation, and pitting
• 5/16-18 UNC thread for broad compatibility with standard tapped holes and nuts
• 1-1/4 inch length under head suits moderate-depth fastening applications
• 1/2 inch hex drive accepts common wrenches and sockets
• Inch measurement system with UNC thread standard

Compatibility

Designed as a standard inch-series hex head cap screw compatible with 5/16-18 UNC tapped holes, nuts, and threaded inserts in any application requiring Grade 316 stainless steel fasteners.

Installation Notes

Installation is performed by the appropriate trade technician for the given application. Always de-energize electrical equipment and relieve system pressure before disassembling fastened components. Use a calibrated torque wrench when a torque specification is provided by the equipment manufacturer. Avoid mixing stainless steel fasteners with dissimilar metals in submerged or highly conductive environments to minimize galvanic corrosion risk.