Value Collection 121125PR Set Screw 1/4-28 X 1/4 in Cone Point

Product Description

The VALUE COLLECTION 121125PR is a cone point set screw designed for secure, positive positioning in mechanical assemblies. Manufactured from Grade 8 alloy steel, this fastener delivers high tensile and torsional strength suited to demanding industrial and trade applications. The cone point geometry bites into mating surfaces to resist rotation and axial movement, making it a reliable choice where vibration or dynamic loading is a concern. It accepts a 1/8-inch hex key drive and conforms to ASME/ANSI B18.3 and ASTM F912 standards. Thread size is 1/4-28 UNF with an overall length of 1/4 inch.

This set screw is used in shaft-to-hub connections, collars, pulleys, gears, and similar mechanical components across industrial, HVAC, and general trade applications. The 1/4-28 UNF thread is a fine-pitch designation that provides precise clamping force adjustment and resistance to loosening. It is well suited to light-gauge assemblies where fine thread engagement is preferred. Typically installed by machinists, maintenance mechanics, and field technicians in both residential and commercial mechanical systems.

Key Features

• Cone point tip provides positive engagement into shaft or mating surface for strong axial and rotational hold
• Grade 8 alloy steel construction delivers high proof load and shear strength
• 1/4-28 UNF fine-pitch thread for precise torque control and vibration resistance
• 1/8-inch hex key drive for standard Allen wrench installation
• Conforms to ASME/ANSI B18.3 and ASTM F912 fastener standards

Compatibility

Designed as a standard 1/4-28 UNF cone point set screw suitable for use in collars, hubs, gears, and other mechanical assemblies requiring a Grade 8 alloy steel fastener to ASME/ANSI B18.3 specification.

Installation Notes

Installation is performed with a 1/8-inch hex key. De-energize or lock out any equipment before accessing the assembly in which this fastener will be installed. Do not exceed the rated drive strength of the hex socket by using impact tools or extended-lever adaptors. Inspect mating shaft or surface for burrs before seating the cone point to ensure proper engagement.