Value Collection 409051PR Set Screw 1/4-20 X 1-3/4 in Cup Point

Product Description

The VALUE COLLECTION 409051PR is a cup point set screw designed for secure, no-slip fastening in mechanical assemblies. Sized at 1/4-20 UNC thread with a 1-3/4 inch length under head, this screw is manufactured from Grade 2 alloy steel for dependable holding strength in demanding applications. The cup point bites into the mating surface to resist rotation and axial movement without the need for a bolt head. Driven with a square drive tool, it seats flush or below the surface of the workpiece. Machinists, millwrights, and industrial maintenance technicians install these in shafts, collars, pulleys, and similar components.

This set screw is suited for use in general industrial and mechanical applications where a headless fastener is required. The 1/4-20 UNC thread is a widely used coarse-thread standard compatible with standard tapped holes across a broad range of equipment. The cup point geometry is appropriate for applications on hardened or unhardened surfaces where a positive bite and resistance to loosening under vibration are priorities.

Key Features

• Cup point geometry bites into mating surface to resist rotation and axial movement
• 1/4-20 UNC coarse thread for broad compatibility with standard tapped holes
• 1-3/4 inch length under head for deeper engagement in thick collars or hubs
• Grade 2 alloy steel construction for reliable mechanical strength
• Square drive reduces cam-out during installation and removal
• Headless profile seats flush or below workpiece surface

Compatibility

Designed as a general-purpose headless set screw for mechanical assemblies using standard 1/4-20 UNC tapped holes, including shafts, collars, pulleys, and hubs across industrial and trade applications.

Installation Notes

Installation is performed with the appropriate square drive key or bit to the specified torque for 1/4-20 fasteners per applicable mechanical standards. Ensure the mating hole is cleanly tapped and free of debris before threading the screw. Power down or de-energize any rotating equipment before servicing components that use set screws. Avoid over-torquing, which can strip the drive socket or damage the mating surface.