Value Collection 111275PR Set Screw 1/4-28 X 5/8 in Knurled Cup

Product Description

The VALUE COLLECTION 111275PR is a 1/4-28 UNF alloy steel set screw with a knurled cup point, designed for secure, vibration-resistant fastening in mechanical assemblies. At 5/8 inches in overall length and driven by a 1/8-inch hex key, this Grade 8 fastener delivers the clamping force and hardness required for demanding industrial and trade applications. It conforms to ASME/ANSI B18.3 and ASTM F912 standards. Machinists, maintenance technicians, and mechanical contractors install this type of fastener when a flush or recessed hold is required against a shaft, collar, or mating surface.

This set screw is suited for use in shaft collars, pulleys, gears, couplings, and similar mechanical components across residential, commercial, and light industrial settings. The knurled cup point bites into the mating surface to resist rotation and axial movement under load, making it a reliable choice for rotating or oscillating assemblies where loosening under vibration is a concern. Sold individually per package with a minimum order quantity of 100 pieces.

Key Features

• 1/4-28 UNF thread for precise, fine-pitch engagement
• Knurled cup point bites into mating surface for enhanced grip and vibration resistance
• Grade 8 alloy steel construction for high tensile and hardness ratings
• 1/8-inch hex drive compatible with standard hex keys and Allen wrenches
• Meets ASME/ANSI B18.3 and ASTM F912 fastener standards
• Fractional inch measurement for straightforward sizing and replacement

Compatibility

Designed as a standard 1/4-28 UNF set screw replacement for use in shaft collars, couplings, pulleys, and other mechanical assemblies requiring a knurled cup point fastener conforming to ASME/ANSI B18.3 and ASTM F912.

Installation Notes

Installation is performed by machinists or mechanical technicians using a 1/8-inch hex key. Ensure the mating shaft or surface is clean and free of debris before driving the screw to full seating depth. De-energize and lock out any rotating equipment before servicing or replacing set screws. Do not exceed the rated torque range appropriate for 1/4-28 Grade 8 fasteners as specified in your assembly documentation.