Armor Coat UST235810 Hex Head Cap Screw 7/16-20 X 3 in Grade 8

Product Description

The ARMOR COAT UST235810 is a Grade 8 hex head cap screw designed for high-strength fastening applications requiring a reliable, corrosion-resistant connection. Sized at 7/16-20 x 3 inches (length under head), this fastener features a UNF (Unified National Fine) thread form and partial threading along the shank. The Armor Coat finish provides added protection against rust and environmental exposure. Grade 8 classification indicates a high-tensile-strength steel construction, making this screw appropriate for demanding mechanical assemblies in HVAC equipment mounting, plumbing bracket hardware, electrical panel framing, and other trade installations. It conforms to ASME B18.2.1 and SAE J429 standards.

This hex head cap screw is suited for use in both residential and commercial trade applications where a fine-thread, high-strength fastener is required. Partial threading allows for clamping force across unthreaded shank sections, which is common in structural connections and equipment mounting. The 7/16-20 thread size is compatible with standard UNF hex nuts and threaded inserts of the same designation. This screw is typically installed by HVAC technicians, plumbers, electricians, and mechanical contractors during equipment installation, structural bracketing, and component assembly.

Key Features

• Grade 8 steel construction for high tensile strength and load-bearing performance
• Armor Coat finish for corrosion resistance in exposed or harsh environments
• 7/16-20 UNF thread form for precise, fine-pitch engagement
• Partially threaded shank for improved clamping in structural joints
• 3-inch length under head suits deep-reach fastening applications
• Meets ASME B18.2.1 and SAE J429 dimensional and mechanical standards

Compatibility

Designed for use with standard 7/16-20 UNF threaded nuts, inserts, and tapped holes in mechanical and structural assemblies requiring Grade 8 hex head fasteners per ASME B18.2.1 and SAE J429 specifications.

Installation Notes

Installation should be performed by a qualified tradesperson using an appropriate hex wrench or socket driver sized for a 7/16-inch hex head fastener. Always ensure the mating nut or tapped hole matches the 7/16-20 UNF thread specification before installation. De-energize or shut down any associated equipment before fastening work begins in electrical or mechanical enclosures. Do not mix Grade 8 hardware with lower-grade nuts or threaded components, as mismatched grades can compromise joint integrity.