Value Collection 409063PR Set Screw 5/16-18 X 1-3/4 in Cup Point

Product Description

The VALUE COLLECTION 409063PR is a cup point set screw designed for secure, permanent-to-semi-permanent shaft and collar locking applications in industrial, mechanical, and trade settings. Manufactured from Grade 2 alloy steel, this fastener features a 5/16-18 UNC thread and measures 1-3/4 inches in length under head. The cup point geometry bites into the mating surface to resist rotational and axial movement. Drive type is square, requiring a square-key wrench for installation. These screws are suited for machine assembly, conveyor systems, HVAC equipment, and general mechanical maintenance work where a reliable set point is required.

This set screw is appropriate for use in residential and commercial mechanical systems wherever a 5/16-18 UNC threaded receiving hole is present. Common applications include locking pulleys, sprockets, collars, and hubs onto shafts. The cup point is well-suited for softer shaft materials where a shallow bite point is acceptable. Minimum order quantity is 100 pieces, sold as individual units per package. Typical users include HVAC technicians, millwrights, and maintenance professionals working on belt-drive or direct-drive assemblies.

Key Features

• Cup point geometry bites into mating surface to resist shaft rotation and axial movement
• Square drive type for positive wrench engagement and high torque transfer
• 5/16-18 UNC thread for compatibility with standard inch-series tapped holes
• Grade 2 alloy steel construction for adequate hardness in general mechanical fastening
• 1-3/4 inch length under head provides deep thread engagement in thicker collars and hubs
• Fractional inch measurement type for straightforward sizing and replacement sourcing

Compatibility

Designed for use in any application requiring a 5/16-18 UNC cup point set screw with a square drive, including standard shaft collars, pulleys, sprockets, and mechanical couplings accepting this thread size and length.

Installation Notes

Installation is performed by threading the screw into a pre-tapped 5/16-18 UNC hole using a square-key wrench of the correct size. De-energize and lock out all equipment before accessing rotating shaft assemblies in accordance with applicable lockout/tagout procedures. Ensure the shaft surface is clean and free of grease at the contact point before seating the cup point. Do not exceed the torque capacity of the drive recess or the material grade of the fastener.