Armor Coat UST235737 Hex Head Cap Screw 1/4-20 Grade 8

Product Description

The ARMOR COAT UST235737 is a Grade 8 steel hex head cap screw with a 1/4-20 UNC thread and a 2.5-inch length under head. It is partially threaded and manufactured to ASME B18.2.1 and SAE J429 standards, making it a high-strength fastener suited for demanding mechanical and structural assembly applications. Grade 8 steel provides significantly higher tensile and proof strength compared to lower-grade fasteners, making it appropriate where joint integrity and resistance to fastener failure are critical. Licensed tradespeople and mechanical contractors use this screw in equipment assembly, bracket mounting, and structural connections requiring a reliable, code-compliant fastener.

This hex head cap screw is used across a broad range of trade and industrial applications, including HVAC equipment mounting, electrical enclosure assembly, plumbing equipment brackets, and general mechanical fabrication. The 1/4-20 UNC thread pattern is one of the most common inch-system thread sizes in North American trade work, and the 2.5-inch under-head length suits applications requiring bolt engagement through multiple material layers or thick stock. It is sold individually per package with a minimum order quantity of 100 units, making it appropriate for stocking and bulk assembly work.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 1/4-20 UNC thread pattern - standard inch-series coarse thread
• 2.5-inch length under head for deep-engagement or multi-layer assemblies
• Partially threaded shank for shear-bearing applications
• Meets ASME B18.2.1 and SAE J429 dimensional and material standards
• Hex head drive accepts standard hex wrenches and sockets

Compatibility

Designed as a standard 1/4-20 UNC hex head cap screw for use in any application requiring a Grade 8 inch-series fastener conforming to ASME B18.2.1 and SAE J429 specifications.

Installation Notes

Installation is performed by qualified mechanics, HVAC technicians, electricians, or plumbers depending on the application. Use the appropriate hex wrench or socket drive to seat the fastener; do not use impact tools without verifying torque requirements against the equipment manufacturer's specifications. Ensure mating threads are clean and free of debris before installation. De-energize any electrical or mechanical equipment before fastening or unfastening hardware in live systems.