Value Collection 592401PR Hex Socket Cap Screw 1/2-20 Unf

Product Description

The VALUE COLLECTION 592401PR is a hex socket cap screw designed for applications requiring a secure, high-strength threaded fastener. With a 1/2-20 UNF thread size and a 1-inch length under head, this screw is fully threaded and driven with a 3/8-inch hex key. Constructed from 18-8 austenitic stainless steel (Austenitic Grade A2), it offers corrosion resistance suitable for demanding environments. The bright, uncoated finish meets ASME/ANSI B18.3 and ASTM F837 standards, making it appropriate for precision mechanical assemblies where dimensional consistency and material traceability matter.

This cap screw is suited for use in industrial, mechanical, and trade service applications where a fine unified thread (UNF) is specified for tighter thread engagement and vibration resistance. Typical installation scenarios include equipment assembly, bracket fastening, and component mounting in environments exposed to moisture or mild corrosives. It is commonly installed by machinists, millwrights, HVAC technicians, and field service professionals working with metal-to-metal connections requiring a recessed-drive fastener.

Key Features

• 1/2-20 UNF thread for fine-pitch engagement and improved vibration resistance
• Fully threaded along the 1-inch length under head for maximum thread contact
• 3/8-inch hex drive size compatible with standard hex keys and Allen-type drivers
• 18-8 stainless steel construction (Grade A2) provides corrosion and oxidation resistance
• Bright, uncoated finish with no additional plating that could affect tolerances
• Meets ASME/ANSI B18.3 and ASTM F837 fastener standards

Compatibility

Designed as an OEM-style replacement or standard-service fastener for assemblies specifying a 1/2-20 UNF hex socket cap screw per ASME/ANSI B18.3 and ASTM F837.

Installation Notes

Installation is typically performed by a licensed mechanic, millwright, or qualified trade technician using a 3/8-inch hex key or Allen driver. Ensure the mating tapped hole is clean and free of debris before threading. De-energize or lock out any equipment before fastener replacement per applicable OSHA lockout/tagout procedures. Do not mix thread forms; confirm the mating thread is 1/2-20 UNF before installation.