Value Collection 40223 Hex Socket Cap Screw 1/4-28 Unf

Product Description

The VALUE COLLECTION 40223 is a hex socket cap screw designed for applications requiring a compact, high-strength fastener with a recessed drive. Sized at 1/4-28 UNF with a 2-inch length under head, this screw is partially threaded and made from alloy steel with a black oxide finish. The 3/16-inch hex drive accepts a standard Allen key or hex bit driver. Black oxide coating provides mild corrosion resistance and reduces light reflection in finished assemblies. This fastener meets ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for precision mechanical and structural fastening tasks performed by machinists, millwrights, and maintenance technicians.

This screw is suited for use in machinery, fixtures, jigs, and equipment assemblies where a flush or low-profile fastener head is required. The 1/4-28 UNF thread pitch is a fine-thread designation, offering improved thread engagement and resistance to vibration loosening compared to coarse-thread equivalents. The partial threading provides a smooth shank section that aids in alignment and shear-load bearing within close-tolerance bores. Typical applications include industrial equipment, tooling plates, and mechanical subassemblies.

Key Features

• 1/4-28 UNF fine-thread specification for improved vibration resistance
• 2-inch length under head, partially threaded for shank shear strength
• 3/16-inch hex socket drive compatible with standard Allen keys and hex bit drivers
• Alloy steel construction meets ASTM A574 high-strength socket screw requirements
• Black oxide finish provides mild corrosion resistance and low-glare appearance
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw suitable for any application requiring a 1/4-28 UNF partially threaded socket head cap screw with a 2-inch length under head.

Installation Notes

Installation is performed by machinists, maintenance technicians, or millwrights using a 3/16-inch hex key or hex bit rated for the torque requirements of the assembly. Always verify that the mating thread is clean and free of debris before installation. Do not exceed the torque specification called out in the equipment service documentation for this thread size and grade. Ensure the assembly is de-energized or depressurized as required by the equipment being serviced before fastener replacement.