Armor Coat UST235833 Hex Head Cap Screw 1/2-20 Grade 8

Product Description

The ARMOR COAT UST235833 is a Grade 8 steel hex head cap screw designed for high-strength fastening applications. It features a 1/2-20 UNF thread and a 2.25-inch length under head with partial threading, conforming to ASME B18.2.1 and SAE J429 standards. The Armor Coat finish provides corrosion resistance suited to demanding service environments. This fastener is installed by mechanical contractors, equipment technicians, and maintenance professionals requiring a high-grade, inch-series threaded fastener with verified dimensional and material certification.

This hex head cap screw is used in structural, mechanical, and equipment assembly applications where high tensile strength and precise thread engagement are required. The 1/2-20 UNF fine thread pattern is common in automotive, HVAC equipment mounting, pump assemblies, and industrial machinery. Partial threading leaves a smooth shank section beneath the head, which is appropriate for applications requiring a bearing surface or close-tolerance hole alignment. It is sold individually but requires a minimum order quantity of 5 units.

Key Features

• Grade 8 steel construction meets SAE J429 high-strength fastener requirements
• 1/2-20 UNF fine thread for precise thread engagement and vibration resistance
• Partially threaded shank allows load-bearing surface contact and hole alignment
• Armor Coat finish delivers corrosion resistance in harsh service conditions
• Conforms to ASME B18.2.1 and ASME/ANSI B18.2.1 dimensional standards
• Inch-series measurement - 2.25-inch length measured under head

Compatibility

Designed as a standard inch-series hex head cap screw for use in any application requiring a 1/2-20 UNF, Grade 8, partially threaded fastener conforming to ASME B18.2.1.

Installation Notes

Installation is performed by qualified mechanical or maintenance technicians. Always de-energize and lock out equipment before fastener service on powered assemblies. Use a calibrated torque wrench and follow the equipment manufacturer's torque specifications for Grade 8 fasteners of this thread size. Do not substitute a lower-grade fastener in applications that specify Grade 8.