Value Collection 209113 Hex Head Cap Screw 7/8-9 X 4 in 18-8 Ss

Product Description

The VALUE COLLECTION 209113 is a 7/8-9 hex head cap screw machined from 18-8 stainless steel and sized at 4 inches under the head. The 7/8-9 designation indicates a 7/8-inch nominal diameter with 9 threads per inch on a Unified National Coarse (UNC) thread form. The 1-5/16-inch hex drive accepts a standard combination wrench or impact socket. Stainless steel grade 18-8 provides solid corrosion resistance in wet, chemical-exposure, and outdoor environments. This fastener is a standard choice for mechanical assemblies, structural connections, and equipment installation where corrosion resistance is a priority.

This screw is suited for general mechanical and structural applications across HVAC equipment mounting, plumbing fixture installation, electrical enclosure assembly, and pool equipment frameworks. The UNC thread form is the most common inch-series thread standard in North America, making this fastener broadly interchangeable with UNC-tapped holes in the same nominal size. It is installed by maintenance technicians, pipefitters, HVAC mechanics, and electricians working with corrosion-resistant hardware.

Key Features

• 18-8 stainless steel construction resists corrosion in wet and chemically active environments
• 7/8-9 UNC thread form is widely compatible with standard inch-series tapped holes
• 4-inch length under head provides clamping range for medium-depth assemblies
• 1-5/16-inch hex head accepts standard wrenches and impact sockets
• Inch measurement system for straightforward spec verification in North American applications

Compatibility

Designed as a standard inch-series hex head cap screw for use in any UNC-tapped hole with a 7/8-9 thread specification where an 18-8 stainless steel fastener is required.

Installation Notes

Installation requires a 1-5/16-inch open-end, box-end, or socket wrench. Verify that the mating tapped hole or nut is also 7/8-9 UNC before assembly. Avoid mixing stainless steel fasteners with dissimilar metals in submerged or high-humidity environments to minimize galvanic corrosion risk. Apply an anti-seize compound rated for stainless steel threads to reduce the risk of galling during installation and future removal.