Armor Coat UST235791 Hex Head Cap Screw 3/8-24 2-3/4 in Grade 8

Product Description

The ARMOR COAT UST235791 is a Grade 8 steel hex head cap screw built to ASME B18.2.1 and SAE J429 standards. It features a 3/8-24 UNF thread with a 2-3/4 inch length under head and partial threading. Grade 8 steel delivers high tensile and proof load strength, making it suitable for demanding mechanical and structural fastening applications in HVAC equipment, electrical enclosures, pumping systems, and related trade assemblies. This screw is intended for professional installation where high-strength fastener specifications are required by design or code.

This cap screw is used across a wide range of commercial and residential trade applications wherever a high-strength, fine-thread fastener is specified. Typical uses include securing mechanical components, mounting brackets, and equipment panels in HVAC systems, plumbing assemblies, pool equipment, and electrical installations. Its partial threading provides clamping force at the joint while the unthreaded shank resists shear loads at the mating surface. Licensed technicians and contractors select Grade 8 hardware when torque and load requirements exceed the capacity of lower-grade fasteners.

Key Features

• Grade 8 steel construction meets SAE J429 high-strength fastener requirements
• 3/8-24 UNF fine thread for precise engagement and higher thread strip resistance
• 2-3/4 inch length under head accommodates deep clamping applications
• Partial threading provides shear resistance in the unthreaded shank zone
• Conforms to ASME B18.2.1 dimensional standards for hex head cap screws
• Inch system measurements for compatibility with standard SAE tooling

Compatibility

Designed as a standard-dimension 3/8-24 UNF hex head cap screw per ASME B18.2.1, suitable for use in any application requiring a Grade 8 partially threaded fastener of this thread size and length.

Installation Notes

Installation should be performed by a qualified technician familiar with fastener torque requirements for Grade 8 hardware. Always de-energize and lock out equipment before replacing or installing fasteners in electrical or mechanical assemblies. Use a properly sized hex wrench or socket to avoid rounding the head. Do not substitute this fastener in applications specifying a different material grade without verifying load and torque specifications with the equipment manufacturer.