Value Collection 409061PR Set Screw 5/16-18 X 1-1/4 in Cup Point

Product Description

The VALUE COLLECTION 409061PR is a Grade 2 steel set screw designed for mechanical assembly applications requiring a headless fastener with a cup point tip. Measuring 5/16-18 thread size by 1-1/4 inches in length, this screw uses a square drive and a cup point that bites into a shaft or mating surface to resist rotation and axial movement. The uncoated bright finish is standard for indoor, dry, or lightly lubricated environments. It conforms to UNC thread standards and is dimensioned by length under head, consistent with ASME fastener specifications. Machinists, millwrights, and maintenance technicians install these in set-screw collars, shaft couplings, and mechanical stops.

This set screw is suited for general industrial and mechanical maintenance applications where a cup point is preferred for positive shaft engagement without a protruding head. Typical installations include motor shaft collars, pulley hubs, gear assemblies, and fixture components. The 5/16-18 UNC thread fits standard tapped holes in steel, aluminum, and cast iron assemblies commonly found in HVAC equipment, pump housings, and industrial machinery.

Key Features

• Cup point tip provides positive grip on shaft or mating surface to resist movement
• Square drive for high torque transfer during installation
• 5/16-18 UNC thread standard ensures broad compatibility with tapped holes
• Grade 2 steel construction suitable for general-purpose mechanical fastening
• Bright uncoated finish — appropriate for dry or lightly lubricated environments
• Headless design allows flush or sub-flush installation in shaft collars and hubs

Compatibility

Designed as a general-purpose replacement or stock fastener for any assembly requiring a 5/16-18 UNC cup point set screw in Grade 2 steel with a square drive.

Installation Notes

Installation is typically performed by machinists, millwrights, or maintenance technicians using a square-drive key or bit sized for the fastener. Always de-energize and lock out any rotating equipment before servicing shaft collars or couplings. Tapped holes should be clean and free of debris before installation. Do not overtighten — snug to manufacturer torque specifications for the collar or hub assembly being serviced.