Value Collection 409077PR Set Screw 3/8-16 X 2-1/4 in Cup Point

Product Description

The VALUE COLLECTION 409077PR is a 3/8-16 x 2-1/4 inch cup point set screw machined from alloy steel to Material Grade 2 specification. Set screws are headless fasteners that thread fully into a tapped hole and apply clamping force through their point to secure a component — such as a shaft collar, pulley, gear, or hub — against rotation or axial movement. The cup point geometry bites into the mating surface to provide reliable holding power under vibration and load. This fastener follows Unified National Coarse (UNC) thread standards, and length is measured as the full body length under head. Installation requires a square drive tool matched to the socket recess.

Cup point set screws of this thread size and length are widely used in mechanical assemblies across HVAC equipment, industrial machinery, pump and motor drives, and general fabrication. They are appropriate for securing shaft-mounted components where the fastener must sit flush with or below the surface of the host part. This grade is suitable for moderate clamping loads in ferrous and non-ferrous assemblies. Sold individually per package; minimum order quantity is 100 pieces.

Key Features

• 3/8-16 UNC thread for broad compatibility with standard tapped holes
• 2-1/4 inch body length provides extended engagement depth for thick hubs or collars
• Cup point geometry bites into shaft surface to resist rotation and axial displacement
• Alloy steel construction for improved strength over plain carbon steel
• Square drive socket for positive torque transfer during installation
• Grade 2 material specification for moderate-load mechanical fastening applications

Compatibility

Designed as a standard UNC set screw for use in any tapped 3/8-16 hole requiring a cup point fastener in mechanical assemblies.

Installation Notes

Installation is performed with a square drive key or bit sized to the socket recess. Ensure the mating tapped hole is clean and free of debris before threading. Power down and de-energize all rotating equipment before installing or adjusting set screws on shafts. Do not exceed the rated clamping capacity of the Grade 2 material; upgrade to a higher material grade if higher preload is required by the application.