Value Collection 581396PR Hex Socket Cap Screw 1/4-28 Unf

Product Description

The VALUE COLLECTION 581396PR is a hex socket cap screw designed for precision fastening in applications requiring a flush or recessed head profile. This fully threaded fastener measures 9/16 inches in length under the head with a 1/4-28 UNF thread and accepts a 3/16-inch hex drive. Manufactured from alloy steel and finished with a black oxide coating, it delivers improved corrosion resistance and a consistent surface finish suitable for industrial and mechanical assemblies. It is installed by machinists, maintenance technicians, and mechanical contractors working with close-tolerance hardware.

This screw is suited for light to medium-duty mechanical assemblies in both commercial and industrial settings. The fine 1/4-28 UNF thread pitch provides strong clamping force and resistance to loosening under vibration, making it a common choice for machine components, fixtures, tooling, and equipment panels. Full threading along the shank length allows engagement across the entire fastened joint. This item is sold individually but requires a minimum order quantity of 100 units.

Key Features

• 1/4-28 UNF fine thread for high clamping force and vibration resistance
• Fully threaded shank for maximum thread engagement
• 3/16-inch internal hex drive for standard Allen wrench installation
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish improves corrosion resistance and reduces light reflection
• Conforms to ASME/ANSI B18.3 socket cap screw standards

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw suitable for tapped holes with 1/4-28 UNF internal threads in metal assemblies, fixtures, and mechanical components.

Installation Notes

Install using a 3/16-inch hex key or Allen driver. Ensure the mating tapped hole is clean and free of debris before threading. Apply appropriate thread-locking compound or torque to specification per the equipment manufacturer's guidelines. Consult applicable mechanical and equipment codes when used in load-bearing or safety-critical assemblies.