Value Collection 592403PR Hex Socket Cap Screw 1/2-20 Unf

Product Description

The VALUE COLLECTION 592403PR is a hex socket cap screw designed for secure, high-torque fastening in demanding mechanical and structural applications. Featuring a 1/2-20 UNF thread size and a 1-1/4 inch length under head, this fastener is fully threaded and driven with a 3/8 inch hex key. Constructed from 18-8 austenitic stainless steel (Austenitic Grade A2), it offers solid corrosion resistance without a secondary coating. This screw meets ASME/ANSI B18.3 and ASTM F837 standards, making it a reliable choice for professionals who require certified, specification-compliant hardware.

This hex socket cap screw is suited for mechanical assemblies, equipment fabrication, and maintenance applications where a low-profile socket-drive fastener is required. The fine 1/2-20 UNF thread pitch provides strong clamping force and resistance to vibration loosening, making it appropriate for precision machinery, fluid system components, and general industrial use. It is commonly installed by machinists, millwrights, pipefitters, and maintenance technicians working in environments where corrosion resistance is a priority.

Key Features

• 1/2-20 UNF fine thread for high clamping force and vibration resistance
• Fully threaded shank along the 1-1/4 inch length under head
• 3/8 inch hex drive for socket key or hex bit installation
• 18-8 stainless steel, Austenitic Grade A2 for corrosion resistance
• Bright/uncoated finish — no added coating that could affect thread tolerances
• Meets ASME/ANSI B18.3 and ASTM F837 standards

Compatibility

Designed as an OEM-style replacement or standard hardware component for any application requiring a 1/2-20 UNF hex socket cap screw with a 1-1/4 inch length under head and 3/8 inch hex drive.

Installation Notes

Install using a 3/8 inch hex key or hex socket bit; ensure the receiving threaded hole is clean and free of debris before driving. Power down or de-energize any equipment before accessing fastener locations on live machinery. Follow applicable industry standards and equipment manufacturer torque specifications for 1/2-20 UNF fasteners, as specific torque values were not provided with this product. Stainless steel fasteners are susceptible to galling — apply an appropriate anti-seize compound when threading into stainless or aluminum mating components.