Value Collection 601241PR Set Screw 1/4-28 X 3in Cup Point

Product Description

The VALUE COLLECTION 601241PR is a cup point set screw designed for mechanical fastening applications where a headless, flush-mount fastener is required. Threaded 1/4-28 (UNF) with an overall length of 3 inches, this set screw is machined from alloy steel for strength and durability under load. It is driven with a 1/8-inch hex key and features a cup point tip that bites into mating surfaces to resist rotation and axial movement. Manufactured to ASME/ANSI B18.3 and ASTM F912 standards, this fastener suits precision mechanical assemblies where dimensional consistency and material integrity are critical. Machinists, millwrights, and maintenance technicians are the primary installers.

Cup point set screws in this size range are commonly used to lock collars, pulleys, gears, and sheaves onto shafts in industrial and commercial mechanical systems. The 1/4-28 fine thread provides strong clamping force with minimal axial movement per rotation, making it well-suited for applications requiring precise adjustment or vibration resistance. This fastener is appropriate for use in HVAC blower assemblies, pump shaft collars, motor couplings, and similar rotating equipment where secure mechanical locking is required.

Key Features

• Cup point geometry bites into shaft surface to resist rotation and axial movement
• 1/4-28 UNF fine thread for precise adjustment and strong clamp load
• 3-inch overall length accommodates deeper shaft engagement or thick hub walls
• Alloy steel construction provides high tensile and torsional strength
• 1/8-inch hex drive for standard hex key or Allen wrench installation
• Meets ASME/ANSI B18.3 and ASTM F912 standards for dimensional and material compliance

Compatibility

Designed as a standard 1/4-28 UNF cup point set screw per ASME/ANSI B18.3, suitable for use in any mechanical assembly requiring a headless hex-drive fastener of this thread size and length.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance technicians using a 1/8-inch hex key. Ensure the shaft and bore are clean and free of debris before threading the screw into the tapped hole. Do not overtorque the fastener, as alloy steel set screws can strip tapped threads in softer hub materials. Always de-energize and lockout/tagout any rotating equipment before servicing shaft-mounted components.