Value Collection 409050PR Set Screw 1/4-20 X 1.5 in Cup Point

Product Description

The VALUE COLLECTION 409050PR is a 1/4-20 x 1.5 inch cup point set screw manufactured from Grade 2 steel with a bright, uncoated finish. Set screws are fully threaded fasteners with no head — they seat flush or below the surface of a workpiece and are driven with a square drive tool. The cup point digs into a mating shaft or surface to resist rotation and axial movement. This fastener follows UNC thread standards and is measured by length under head. Machinists, millwrights, and maintenance technicians install these in mechanical assemblies, shaft collars, pulleys, and similar applications where a headless fastener is required.

This set screw is suited for general industrial and mechanical applications where a standard-duty, fractional-inch UNC fastener is needed. The cup point profile provides reliable holding power on soft to medium-hardness shafts without requiring a flat or dog-point seat. The uncoated steel finish is appropriate for indoor or protected environments. These are sold individually but carry a minimum order quantity of 100 pieces, making them appropriate for shop stock, MRO replenishment, and production assembly use.

Key Features

• 1/4-20 UNC thread size with 1.5 inch length measured under head
• Cup point geometry bites into shaft material to resist rotation and axial load
• Square drive for positive tool engagement and high installation torque transfer
• Grade 2 steel construction for standard-duty mechanical fastening
• Bright, uncoated finish — no coating to add dimensional variation
• Fractional inch measurement type for compatibility with standard inch-dimensioned components

Compatibility

Designed as a standard 1/4-20 UNC cup point set screw for use in any application requiring a headless fastener of this thread size and length, including shaft collars, setscrewed hubs, and mechanical assemblies built to fractional-inch standards.

Installation Notes

A licensed machinist or qualified maintenance technician typically installs set screws using a square drive key or bit sized to the fastener. Power down and de-energize any equipment before servicing assemblies that contain set screws. Ensure the mating shaft or bore is clean and free of debris before installation. Do not over-drive — stop when the cup point is firmly seated against the shaft surface.