Value Collection R63266641 Set Screw 1/4-28 Unf Cup Point

Product Description

The VALUE COLLECTION R63266641 is a 1/4-28 UNF cup point set screw manufactured from 18-8 stainless steel. Set screws are fully threaded fasteners with no head — they seat flush or below the surface and apply clamping force through direct contact between the cup point and the mating part. This screw measures 1/4 inch in overall length and is driven with a 1/8-inch hex key. The 18-8 stainless steel construction provides corrosion resistance suitable for general industrial and mechanical applications. Installation requires a standard 1/8-inch hex key (Allen wrench) and no additional tooling.

Cup point set screws like the R63266641 are widely used in mechanical assemblies where a shaft-to-hub or collar-to-shaft connection must resist rotational movement. The cup point geometry bites into the mating surface to resist rotation and axial movement, making it a common choice for collars, pulleys, gears, and hubs in HVAC equipment, pump assemblies, and general mechanical components. This fastener is suited for installations where flush seating and corrosion resistance are required.

Key Features

• 1/4-28 UNF thread provides a fine-pitch engagement for precise tightening control
• Cup point geometry bites into mating surfaces to resist rotation and axial movement
• 18-8 stainless steel construction resists corrosion in wet or humid environments
• 1/4-inch overall length suits compact shaft collar and hub applications
• 1/8-inch hex drive compatible with standard Allen keys and hex bit drivers
• Fully threaded, headless design allows flush or sub-flush installation

Compatibility

Designed as a standard 1/4-28 UNF cup point set screw suitable for use in any application requiring this thread size, point type, and 18-8 stainless steel material grade.

Installation Notes

Installation is performed by threading the set screw into a tapped hole until the cup point contacts the mating shaft or surface, then tightening with a 1/8-inch hex key. Ensure the receiving thread is clean and free of debris before installation. Do not over-torque — stainless steel fasteners are susceptible to galling; applying an anti-galling lubricant to the threads is common practice. Confirm thread engagement and seating before returning the assembly to service.