Value Collection 3tbt905c0308 Hex Head Cap Screw 5/16-18

Product Description

The VALUE COLLECTION 3tbt905c0308 is a fully threaded hex head cap screw designed for fastening applications that demand corrosion resistance and mechanical strength. Built to a 5/16-18 UNC thread specification with a 3-1/2 inch length under head, this fastener is manufactured from Grade 316 stainless steel and left uncoated with a bright finish. Grade 316 stainless offers superior resistance to chlorides, chemicals, and marine environments compared to standard 304 stainless. Plumbers, pipefitters, HVAC technicians, and industrial maintenance trades rely on fasteners like this for equipment installation, pipe support hardware, and panel assembly where long-term corrosion resistance is required.

This cap screw is suited for use in marine, coastal, food service, chemical processing, and general industrial environments where moisture or corrosive media are present. The fully threaded shank allows maximum thread engagement across the entire length under head, making it practical for shorter clamping distances and through-bolt applications. It is appropriate for use in both structural and equipment-mounting scenarios that call for an Inch-system UNC fastener in 5/16-18 sizing.

Key Features

• Grade 316 stainless steel construction provides enhanced chloride and chemical corrosion resistance
• Fully threaded along the entire 3-1/2 inch length under head for maximum thread engagement
• 5/16-18 UNC thread form conforms to standard Inch-system fastener specifications
• Bright uncoated finish — no added coating that could affect dimensional tolerances or chemical compatibility
• Hex head drive style accepts standard hex keys and sockets common to trade toolkits

Compatibility

Designed as a standard 5/16-18 UNC hex head cap screw suitable for use wherever a fully threaded, Grade 316 stainless steel Inch-system fastener is specified.

Installation Notes

Installation should be performed by a qualified tradesperson using appropriate hex socket or open-end tooling sized for a 5/16-18 fastener. Always verify the mating thread is clean and free of debris before installation. Do not mix stainless steel fasteners with dissimilar metals in environments where galvanic corrosion is a concern without appropriate isolation. Apply an anti-seize compound compatible with stainless steel to prevent galling during installation and future removal.