Value Collection 409067PR Set Screw 5/16-18 X 3 in Cup Point

Product Description

The VALUE COLLECTION 409067PR is a cup point set screw designed for mechanical fastening applications where a threaded fastener must bear against a shaft or mating surface without a protruding head. Sized at 5/16-18 UNC thread by 3 inches in length, this screw is manufactured from Grade 2 steel with a bright, uncoated finish. The cup point geometry concentrates clamping force at the contact area, providing reliable axial and rotational resistance. Drive type is square, requiring a matching square-key driver. This type of fastener is standard inventory for machinists, millwrights, and maintenance technicians working on rotating equipment, collars, pulleys, and mechanical assemblies.

Cup point set screws in this size range are commonly used in light to medium-duty industrial and mechanical maintenance applications. Typical installations include shaft collars, sprocket hubs, gear bores, and similar components where a flush or recessed fastening point is required. The 5/16-18 UNC thread is a widely used fractional inch coarse thread, compatible with standard tapped holes across a broad range of manufactured components. Grade 2 steel provides adequate strength for general-purpose use in non-critical mechanical assemblies.

Key Features

• 5/16-18 UNC coarse thread for broad compatibility with standard tapped holes
• 3-inch length measured under head, suitable for deeper engagement applications
• Cup point geometry concentrates load and resists slippage on shafts and bores
• Square drive type for positive torque transfer with minimal cam-out
• Grade 2 steel construction for general-purpose mechanical fastening
• Bright, uncoated finish — no added coating to affect thread fit

Compatibility

Designed as a general-purpose set screw for use in any standard 5/16-18 UNC tapped hole, including shaft collars, hubs, pulleys, and mechanical assemblies requiring a headless cup point fastener.

Installation Notes

Installation requires a square-key driver matched to the screw drive size. Ensure the receiving component is fully threaded to the required depth before installation and that the shaft or seating surface is clean and free of debris. De-energize and lock out any rotating equipment before servicing components secured by set screws. Follow applicable mechanical and industrial safety standards for fastener torque and assembly procedures.