Value Collection 409056PR Set Screw 5/16-18 X 1/2 in Cup Point

Product Description

The VALUE COLLECTION 409056PR is a 5/16-18 cup point set screw designed for mechanical assemblies where a fastener must apply holding force without protruding above a surface. Manufactured from Grade 2 steel with a bright uncoated finish, this headless fastener measures 1/2 inch in length and threads to the Unified National Coarse (UNC) standard. The cup point geometry bites into the mating surface to resist rotation and axial movement. Length is measured under the head per standard fractional inch convention. This screw is installed by machinists, millwrights, and maintenance technicians using a square drive tool.

Cup point set screws are a standard component in shaft-to-hub connections, collars, pulleys, gears, and similar mechanical couplings. The 5/16-18 thread size is common in light to medium-duty industrial and HVAC equipment assemblies. This part is sold in minimum order quantities of 100, making it suitable for shop stock, MRO inventory replenishment, and production line use. The bright uncoated finish is appropriate for indoor and dry-environment applications where corrosion resistance is not a primary requirement.

Key Features

• Cup point geometry bites into shaft material to resist axial and rotational movement
• 5/16-18 UNC thread for broad compatibility with standard tapped holes
• Grade 2 steel construction for light to medium-duty clamping loads
• Bright uncoated finish suits dry indoor assembly environments
• Square drive type for positive torque engagement with standard square-drive keys
• Length measured under head per fractional inch standard

Compatibility

Designed as a standard UNC headless set screw for use in any tapped 5/16-18 application requiring a cup point style, including shaft collars, hubs, pulleys, and mechanical couplings in industrial and equipment-maintenance settings.

Installation Notes

Installation requires a properly sized square drive key; using a worn or incorrect key risks rounding the socket and stripping the fastener. Ensure the receiving hole is cleanly tapped to 5/16-18 UNC before installation. De-energize and lock out any rotating equipment before servicing shaft connections that use set screws. Do not exceed the torque capacity appropriate for Grade 2 steel fasteners of this thread size per your applicable mechanical or equipment service standard.