Armor Coat UST235751 Hex Head Cap Screw 5/16-18 Grade 8

Product Description

The ARMOR COAT UST235751 is a fully threaded hex head cap screw designed for high-strength fastening applications in mechanical, structural, and equipment assembly work. Manufactured from Grade 8 steel with an Armor Coat finish for corrosion resistance, this fastener meets ASME B18.2.1 and SAE J429 dimensional and strength standards. The 5/16-18 UNC thread profile and 1-1/4 inch length under head make it a dependable choice where precise fit and tensile performance are required. Installers in HVAC, plumbing, electrical, and general mechanical trades rely on Grade 8 hardware for high-load connections that standard zinc-plated fasteners cannot handle.

This cap screw is suited for use in equipment mounting, bracket assembly, panel fastening, and other structural connections where Grade 8 strength and a corrosion-resistant finish are specified. The UNC thread form is compatible with standard inch-series tapped holes and nuts. Minimum order quantity is 100 pieces, making it appropriate for service fleets, shop stock, and job-site supply. Each package contains 1 piece per the supplier unit of measure.

Key Features

• Grade 8 steel construction for high tensile and proof-load strength
• Armor Coat finish provides corrosion protection in exposed or outdoor installations
• Fully threaded shank along the 1-1/4 inch length under head
• 5/16-18 UNC thread for compatibility with standard inch-series fastener hardware
• Meets ASME B18.2.1 and SAE J429 standards for dimensional accuracy and mechanical properties

Compatibility

Designed for use in standard inch-series tapped holes and with 5/16-18 UNC hex nuts and washers. Suitable for general mechanical and structural fastening applications requiring Grade 8 tensile strength and a corrosion-resistant finish.

Installation Notes

Install using a standard hex socket or open-end wrench sized for the 5/16 hex head. Follow equipment manufacturer torque specifications for Grade 8 fasteners at this thread size. Ensure mating threads are clean and free of debris before assembly. Replace any fastener that shows signs of thread damage, galling, or coating failure.