Value Collection VS1166PS Hex Head Cap Screw 1/2-13

Product Description

The VALUE COLLECTION VS1166PS is a hex head cap screw sized 1/2-13 x 1-1/4 inches, manufactured from silicon bronze alloy grade C651. It features a fully threaded shank with Unified National Coarse (UNC) thread form and a bright, uncoated finish. Conforming to ASME B18.2.1, this fastener is suited for applications where corrosion resistance and moderate tensile strength are required. The 3/4-inch hex drive accommodates standard wrenches for consistent installation torque. Plumbers, marine mechanics, and industrial maintenance technicians commonly specify silicon bronze fasteners where galvanic compatibility with copper, brass, or bronze components is a priority.

This cap screw is used in plumbing, marine, and general industrial assemblies where exposure to moisture, salt air, or corrosive media rules out standard steel or zinc-plated hardware. Typical applications include pipe flange connections, pump housings, valve bodies, and marine deck fittings. The fully threaded length of 1-1/4 inches allows engagement through standard material thicknesses without the need for a nut in blind-hole configurations, provided the receiving thread is properly tapped to 1/2-13 UNC.

Key Features

• Silicon bronze C651 construction provides strong corrosion resistance in wet, marine, and chemical environments
• Fully threaded 1-1/4-inch shank for maximum thread engagement in tapped blind holes
• 1/2-13 UNC thread form meets ASME B18.2.1 dimensional standards
• Bright uncoated finish preserves dimensional tolerances and allows visual inspection of the fastener surface
• 3/4-inch hex drive compatible with standard combination wrenches and sockets

Compatibility

Designed for use in any tapped 1/2-13 UNC threaded hole requiring a hex head cap screw in silicon bronze; suitable for plumbing, marine, pump, and valve assembly applications where corrosion-resistant fasteners are specified.

Installation Notes

Installation should be performed by a qualified mechanic, plumber, or marine technician using a properly sized 3/4-inch wrench or socket. Clean and inspect the threaded hole for debris or damage before installation. Do not mix silicon bronze fasteners with incompatible metals in highly conductive electrolyte environments without consulting a galvanic compatibility chart. Follow applicable ASME, IFGC, or IPC torque guidelines for the specific joint design and material.