Value Collection 581493PS Hex Socket Cap Screw 3/8-24 Unf

Product Description

The VALUE COLLECTION 581493PS is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, machinery, and structural connections. It features a 3/8-24 UNF thread with a 1-3/8 inch length under head and is fully threaded along its shank. The 5/16 inch hex drive accepts a standard Allen wrench or hex bit driver. Constructed from alloy steel with a black oxide finish, this fastener delivers reliable corrosion resistance and surface hardness suited for demanding industrial and maintenance environments. It meets ASME/ANSI B18.3 and ASTM A574 standards, making it a recognized choice for precision fastening work.

This screw is used in a wide range of applications including equipment repair, fixture assembly, tooling setups, and general mechanical fabrication. The fine 3/8-24 UNF thread pitch provides better thread engagement and vibration resistance compared to coarse-thread equivalents, making it well-suited for applications where loosening under dynamic load is a concern. Machinists, millwrights, maintenance technicians, and industrial assemblers commonly specify this fastener type for close-tolerance work.

Key Features

• 3/8-24 UNF fine thread for improved vibration resistance and precise torque control
• Fully threaded shank maximizes thread engagement across the full 1-3/8 inch length under head
• 5/16 inch internal hex drive accepts standard Allen wrenches and hex bit drivers
• Alloy steel construction meets ASTM A574 for high-strength fastener requirements
• Black oxide finish provides mild corrosion resistance and reduces light reflection in precision assemblies
• Conforms to ASME/ANSI B18.3 dimensional standards for consistent fitment

Compatibility

Designed as a standard-dimension replacement or new-installation fastener for applications requiring a 3/8-24 UNF hex socket cap screw per ASME/ANSI B18.3 specifications.

Installation Notes

Installation is performed with a 5/16 inch hex key or Allen-drive bit; ensure the driver is fully seated before applying torque to avoid rounding the socket. Power down or de-energize any equipment before fastener service on live machinery. Follow applicable torque specifications from the equipment manufacturer or relevant ASME standards for alloy steel socket cap screws at this thread size. Inspect the mating threads for damage or contamination before installation.