Value Collection 101345PR Set Screw 1/4-28 X 1/2 in Cup Point

Product Description

The VALUE COLLECTION 101345PR is a 1/4-28 UNF cup point set screw machined from Grade 8 alloy steel. Set screws are fully threaded fasteners with no head — they seat flush or below the surface of the mating part, applying clamping force through the point alone. The cup point digs into the shaft or mating surface to resist rotational and axial movement. This screw is driven with a 1/8-inch hex key and conforms to ASME/ANSI B18.3 and ASTM F912 standards. It is used by machinists, millwrights, and maintenance mechanics in precision assembly and repair applications where a headless fastener is required.

Cup point set screws like the 101345PR are common in shaft collars, shaft couplings, pulleys, gears, and sprockets across light industrial and mechanical assembly work. The 1/4-28 UNF thread provides fine-pitch engagement suited for applications where precise torque control and vibration resistance matter. Grade 8 alloy steel construction delivers high tensile and torsional strength for demanding load conditions. Minimum order quantity for this part is 100 pieces.

Key Features

• Cup point geometry bites into shaft surface for positive rotational and axial hold
• Grade 8 alloy steel for high strength in demanding assembly applications
• 1/4-28 UNF fine thread for precise engagement and vibration resistance
• 1/8-inch hex drive — fits standard hex keys and Allen wrenches
• Conforms to ASME/ANSI B18.3 and ASTM F912 dimensional and material standards
• Headless design allows flush or sub-flush installation in counterbored holes

Compatibility

Designed as a standard ASME/ANSI B18.3 set screw for use in any application requiring a 1/4-28 UNF cup point headless fastener in alloy steel.

Installation Notes

Installation is performed with a 1/8-inch hex key torqued by hand or with a T-handle driver. Ensure the mating shaft or surface is clean and free of burrs before seating the cup point. Power down and de-energize any rotating equipment before installing or removing set screws. Apply a thread-locking compound if vibration loosening is a concern in the application.