Value Collection R56000330 Hex Cap Screw 5/16-18 X 4 in 316 Ss

Product Description

The VALUE COLLECTION R56000330 is a fully threaded hex head cap screw designed for fastening applications that demand corrosion resistance. Sized at 5/16-18 x 4 inches with a Unified National Coarse (UNC) thread standard, it is machined from Grade 316 stainless steel and left uncoated to maintain its natural surface finish. The fully threaded shank runs the entire 4-inch length under the head, providing maximum thread engagement across the full fastener body. Plumbers, pipefitters, HVAC technicians, and industrial maintenance trades commonly specify 316 SS hardware where exposure to moisture, chemicals, or marine environments makes carbon steel unsuitable.

This fastener is suited for use in wet, outdoor, or chemically aggressive environments such as plumbing brackets, HVAC equipment mounting, pool and spa equipment frames, and marine or coastal installations. The 5/16-18 UNC thread pattern is a widely used standard size compatible with matching hex nuts, lock nuts, and tapped holes following inch-series coarse thread specifications. Sold individually with a minimum order quantity of 10 pieces.

Key Features

• Grade 316 stainless steel construction for superior corrosion and chloride resistance compared to Grade 304
• Fully threaded shank maximizes thread engagement along the entire 4-inch under-head length
• 5/16-18 UNC thread standard ensures compatibility with standard inch-series hardware
• Uncoated finish maintains dimensional accuracy and avoids coating thickness variation at mating surfaces
• Lightweight at 0.0375 pounds per fastener, suitable for weight-sensitive assemblies

Compatibility

Designed for use with standard 5/16-18 UNC inch-series hex nuts, flat washers, lock washers, and tapped holes conforming to Unified National Coarse thread specifications.

Installation Notes

Installation requires a standard hex wrench or socket sized for a 5/16-inch hex head cap screw. De-energize or shut down any equipment before fastening or removing hardware in live mechanical or electrical assemblies. Avoid mixing 316 stainless steel fasteners with dissimilar metals in direct contact to minimize galvanic corrosion risk. Follow applicable mechanical codes and equipment manufacturer torque recommendations for the specific joint being assembled.