Armor Coat UST235934 Socket Cap Screw 1/4-20 4 in

Product Description

The ARMOR COAT UST235934 is a partially threaded socket cap screw designed for high-strength fastening applications in mechanical, industrial, and trade service work. It features a 1/4-20 thread size and a 4-inch length under head, with a socket cap head driven by a 3/16-inch hex key. The screw is manufactured from alloy steel and finished with an Armor Coat corrosion-resistant coating, making it suited for environments where standard zinc or plain finishes would corrode prematurely. Meets ASME B18.3 dimensional standards for socket head cap screws.

This screw is used in general mechanical assemblies, equipment maintenance, and fixture fabrication where a low-profile cap head and internal hex drive are required. The partial threading allows for shoulder-style clamping force in through-hole and clearance-hole applications. Typical installers include millwrights, pipefitters, HVAC equipment technicians, and general maintenance mechanics working on industrial or commercial machinery.

Key Features

• 1/4-20 thread size with 4-inch length under head for deep fastening applications
• Partially threaded shank for precise clamping in clearance-hole assemblies
• Alloy steel construction provides high tensile strength
• Armor Coat finish offers enhanced corrosion resistance over standard finishes
• 3/16-inch hex socket drive for secure torque transfer with standard hex keys or Allen drivers
• Conforms to ASME B18.3 dimensional standards

Compatibility

Designed as an OEM-style replacement or direct-fit fastener for mechanical assemblies requiring a 1/4-20 partially threaded socket cap screw conforming to ASME B18.3.

Installation Notes

Installation is performed by maintenance mechanics or trade technicians using a 3/16-inch hex key or Allen driver. Ensure mating threads are clean and free of debris before installation. Apply thread-locking compound or anti-seize as required by the assembly specification. Minimum order quantity is 5 units per order increment.