Value Collection 409047PR Set Screw 1/4-20 X 7/8 in Cup Point

Product Description

The VALUE COLLECTION 409047PR is a 1/4-20 UNC cup point set screw manufactured from Grade 2 alloy steel. Set screws are headless fasteners that thread fully into a tapped hole and bear against a shaft, hub, or mating surface to resist rotation and axial movement. This screw measures 7/8 inches in length, measured under the head per standard fractional inch convention. The square drive socket is engaged with a square-drive key or bit for installation and removal. Grade 2 alloy steel construction provides the hardness and shear strength required for standard mechanical holding applications in light-to-medium duty assemblies. Licensed trade professionals and mechanical maintenance technicians install these fasteners in production and service settings.

Cup point set screws in the 1/4-20 thread size are widely used in shaft collars, shaft couplings, pulleys, sprockets, gears, and hand wheels across HVAC mechanical drive systems, light industrial equipment, and general machinery. The cup point geometry bites into the mating shaft surface to improve holding force compared to flat or oval point styles. This screw is sold individually, with a minimum order quantity of 100 pieces per order, making it suited for production runs, maintenance kits, and stocking requirements.

Key Features

• Cup point geometry for positive shaft engagement and improved rotational holding force
• Square drive socket for positive bit engagement during installation and removal
• 1/4-20 UNC thread standard for broad tool and tap compatibility
• Grade 2 alloy steel construction for hardness suitable in standard mechanical applications
• 7/8 inch length measured under head per fractional inch standard
• Sold individually; minimum order quantity of 100 units per order

Compatibility

Designed as a standard 1/4-20 UNC cup point set screw for use in any tapped 1/4-20 threaded hole requiring a square drive headless fastener in light-to-medium duty mechanical assemblies.

Installation Notes

Installation requires a properly sized square-drive key or bit; do not substitute an ill-fitting driver as it will damage the socket. Ensure the mating tapped hole is clean and free of debris before threading. Torque to the assembly specification for the application — do not rely on feel alone for safety-critical holding requirements. Consistent thread engagement depth should be verified before returning the assembly to service.