Armor Coat UST235878 Hex Socket Cap Screw 3/4-16 Unf

Product Description

The ARMOR COAT UST235878 is a hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and trade environments. Built from alloy steel with an Armor Coat finish for corrosion resistance, this fastener features a 3/4-16 UNF thread size and a 5-inch length under the head. Drive engagement is achieved through a 1-1/8 inch hex socket drive. Partial threading allows for controlled clamping force across a range of joint configurations. This screw conforms to ASME B18.2.1 and SAE J429 standards, making it suitable for demanding structural and mechanical assembly work.

This screw is used in heavy mechanical assemblies, industrial equipment maintenance, and structural fastening applications where a high-strength, corrosion-resistant fastener is required. The 3/4-16 UNF thread pitch is a fine-thread specification, commonly used where vibration resistance or precise thread engagement is critical. Trades including millwrights, pipefitters, heavy equipment technicians, and industrial maintenance professionals will encounter this fastener in machine frames, hydraulic assemblies, and structural brackets.

Key Features

• Alloy steel construction provides high tensile strength for demanding load applications
• Armor Coat finish delivers corrosion protection in harsh or outdoor environments
• 3/4-16 UNF fine-thread profile improves vibration resistance and clamping precision
• 1-1/8 inch hex socket drive for use with standard hex key or socket tooling
• Partially threaded shank for controlled clamping and accurate joint alignment
• Conforms to ASME B18.2.1 and SAE J429 fastener standards

Compatibility

Designed as a standard-specification hex socket cap screw for use in any application requiring a 3/4-16 UNF partially threaded fastener with a 5-inch length under head and 1-1/8 inch hex drive, conforming to ASME B18.2.1 and SAE J429.

Installation Notes

Installation should be performed by a qualified mechanic or industrial technician using a calibrated torque wrench and the appropriate 1-1/8 inch hex socket or hex key. Always verify thread compatibility with the mating nut or tapped hole before installation. De-energize and lock out any equipment before servicing fastened assemblies per applicable OSHA lockout/tagout procedures. Do not substitute thread pitch or drive size without engineering review.