Value Collection 3SSC905F0308 Hex Cap Screw 5/16-24

Product Description

The VALUE COLLECTION 3SSC905F0308 is a partially threaded hex head cap screw sized at 5/16-24 x 3-1/2 inches, manufactured from 18-8 stainless steel with an uncoated finish. The 5/16-24 designation indicates a 5/16-inch nominal diameter with a 24-thread-per-inch pitch following the Unified National Fine (UNF) standard. Partial threading allows the unthreaded shank to bear shear loads while the threaded section engages the mating fastener or tapped hole. This screw is suited for mechanical assembly work in corrosive or moisture-prone environments where stainless steel fasteners are specified by design or code.

This fastener is used in a wide range of industrial, HVAC, plumbing, and mechanical applications where UNF fine-thread fasteners are required and corrosion resistance is a priority. The 18-8 stainless steel grade performs well in exterior, marine-adjacent, and high-humidity installations. It is installed by mechanical contractors, HVAC technicians, and plumbers working with equipment panels, flanges, brackets, and similar hardware.

Key Features

• 5/16-24 UNF fine-thread pitch for precise thread engagement and reduced vibration loosening
• 3-1/2 inch length under head for deep-reach fastening applications
• Partially threaded shank to handle shear loads along the unthreaded section
• 18-8 stainless steel construction provides corrosion and oxidation resistance
• Uncoated finish maintains dimensional accuracy and avoids coating buildup in tight tolerances
• Inch measurement system with standard hex drive for common hand and power tools

Compatibility

Designed as a standard UNF 5/16-24 hex head cap screw compatible with any tapped hole or mating nut conforming to the Unified National Fine thread standard at 5/16-inch nominal diameter.

Installation Notes

This fastener is installed using a standard hex wrench or socket drive sized for a 5/16-inch hex head cap screw. Ensure the mating tapped hole or nut matches the UNF 5/16-24 thread specification before installation. Power down or de-energize any associated equipment before performing fastener work on live assemblies. Do not overtighten stainless steel fasteners, as galling can occur; applying anti-seize compound to the threads is a common field practice when working with stainless-to-stainless mating parts.