Armor Coat UST235827 Hex Head Cap Screw 1/2-13 Grade 8

Product Description

The ARMOR COAT UST235827 is a Grade 8 steel hex head cap screw designed for high-strength fastening applications. Sized at 1/2-13 UNC thread with a 6-1/2 inch length under head, this fastener is partially threaded to allow clamping force to bear on the unthreaded shank. Grade 8 steel delivers significantly higher tensile strength than standard Grade 2 or Grade 5 hardware, making it appropriate for structural, mechanical, and industrial assemblies where joint integrity is critical. It meets ASME B18.2.1 and SAE J429 standards, confirming dimensional and mechanical compliance.

This cap screw is used across a broad range of trade and industrial applications including HVAC equipment mounting, structural steel assemblies, heavy machinery, and mechanical equipment frames. The 1/2-13 UNC thread is one of the most common coarse-thread sizes in the inch fastener system, compatible with standard 1/2-13 hex nuts, flanged nuts, and tapped holes. Partial threading makes this fastener particularly suited for through-bolt applications where shank strength and precise grip length matter.

Key Features

• Grade 8 steel construction for high tensile strength and hardness
• 1/2-13 UNC coarse thread - widely compatible with standard inch-system hardware
• 6-1/2 inch length under head for deep-grip or long-reach fastening applications
• Partial threading preserves shank integrity for shear-load and through-bolt installations
• Meets ASME B18.2.1 and SAE J429 standards for dimensional and mechanical compliance

Compatibility

Designed for use with standard 1/2-13 UNC inch-system hardware including hex nuts, lock nuts, and tapped components conforming to ASME B18.2.1 dimensional standards.

Installation Notes

Installation is typically performed by millwrights, ironworkers, pipefitters, or HVAC mechanics depending on the application. Always use a calibrated torque wrench and consult applicable torque charts for Grade 8 fasteners at 1/2-13 thread size. Ensure mating threads and bearing surfaces are clean and free of debris before assembly. Do not substitute lower-grade hardware in joints specified for Grade 8 fasteners.