Value Collection VS1066PR Hex Head Cap Screw 5/16-18

Product Description

The VALUE COLLECTION VS1066PR is a hex head cap screw sized 5/16-18 x 1 inch, manufactured from silicon bronze alloy grade C651. It features a fully threaded shank with a Unified National Coarse (UNC) thread standard and a bright, uncoated finish. The 1/2-inch hex drive head accepts standard hex wrenches or sockets. Conforming to ASME B18.2.1, this fastener is suited for applications where corrosion resistance and moderate tensile strength are both required. Licensed trades and maintenance professionals use silicon bronze fasteners in marine, plumbing, and corrosive-environment installations where steel hardware would degrade prematurely.

This screw is appropriate for use in residential and light commercial applications involving exposure to moisture, mild chemicals, or saltwater environments. Common installation scenarios include marine hardware, bronze valve and fitting assemblies, pump mounting, and general corrosion-resistant mechanical assemblies. The fully threaded shank allows fastening through the full length of the grip without an unthreaded shoulder, making it well suited for thin-material clamping or through-bolting applications.

Key Features

• Silicon bronze alloy grade C651 for strong corrosion resistance in wet and marine environments
• Fully threaded shank for maximum thread engagement across the full 1-inch length under head
• UNC 5/16-18 thread form conforming to ASME B18.2.1 for dimensional consistency
• Bright, uncoated finish — no plating to chip or flake in service
• 1/2-inch hex head accepts standard wrenches and sockets without specialty tooling

Compatibility

Designed as a standard inch-series hex head cap screw for use in any application requiring a 5/16-18 UNC fastener in silicon bronze material. No specific OEM model compatibility is specified for this part.

Installation Notes

Installation is performed by maintenance technicians, plumbers, marine mechanics, or millwrights using a standard 1/2-inch wrench or socket. De-energize and depressurize any equipment before replacing fasteners on live systems. Avoid overtightening silicon bronze fasteners, as the alloy is softer than carbon steel and is susceptible to thread galling — apply an anti-seize compound appropriate for bronze when threading into ferrous or dissimilar metals. Follow applicable codes such as ASME or ABYC standards for the specific application.