Value Collection R57001157 Hex Head Cap Screw 7/16-20

Product Description

The VALUE COLLECTION R57001157 is a fully threaded hex head cap screw designed for use in mechanical assemblies, structural connections, and equipment fabrication. Built to a 7/16-20 UNF thread specification with a 1-inch length under head, this fastener is machined from 18-8 stainless steel and left uncoated. The 18-8 stainless alloy provides strong corrosion resistance in wet, outdoor, and chemically exposed environments, making it a common choice for plumbing fixtures, HVAC equipment frames, pool equipment enclosures, and marine-adjacent applications. Electricians, plumbers, and HVAC technicians reach for stainless fasteners when galvanic compatibility or moisture exposure rules out zinc-plated carbon steel.

This cap screw suits residential and light commercial applications where a fine-thread UNF fastener is required for higher-load clamping or use in tapped holes in softer materials. The fully threaded shank maximizes thread engagement across the full 1-inch length under head. It is appropriate for use wherever corrosion resistance, a clean uncoated finish, and a standard hex drive are specified. Installers working on pool equipment pads, rooftop HVAC curbs, and outdoor electrical enclosures frequently specify 18-8 stainless hardware for longevity in exposed conditions.

Key Features

• 18-8 stainless steel construction for reliable corrosion resistance in wet and outdoor environments
• 7/16-20 UNF fine-thread profile for higher clamping force and use in tapped softer-material holes
• Fully threaded shank provides maximum thread engagement along the full 1-inch length under head
• Uncoated finish maintains dimensional accuracy and avoids coating incompatibility concerns
• Standard hex head accepts common wrenches and sockets without specialty tooling

Compatibility

Designed as a standard UNF hex head cap screw for use in any application calling for a 7/16-20 fully threaded fastener with a 1-inch length under head in 18-8 stainless steel.

Installation Notes

Installation should be performed by the qualified trade professional responsible for the assembly being fastened. Always verify thread engagement depth and material compatibility before driving the fastener. Use a properly sized hex wrench or socket to avoid fastener head rounding. In stainless-to-stainless thread applications, apply an anti-galling compound to prevent thread seizure during installation.