Value Collection 409223BR Set Screw 7/8-9 Cup Point Alloy Steel

Product Description

The VALUE COLLECTION 409223BR is a cup point set screw designed for mechanical assemblies where a fastener must apply clamping or locking force without a protruding head. Sized at 7/8-9 UNC threading and 5-1/2 inches in length, this screw is manufactured from alloy steel to Grade 2 specification, providing the hardness and shear strength required for demanding industrial and mechanical applications. The cup point geometry bites into the mating surface to resist rotation and axial movement. Installation requires a square drive tool sized to match the socket recess. At 0.02 pounds, this is a single-unit fastener suited for precision-fit work.

This set screw is appropriate for use in collars, hubs, shafts, and similar rotating or stationary assemblies found in industrial machinery, HVAC equipment, pumping systems, and general mechanical installations. The 7/8-9 UNC thread standard makes it compatible with standard inch-series tapped holes of the same designation. It is typically installed by millwrights, maintenance technicians, or mechanical contractors working on equipment that requires headless fasteners to sit flush or below the surface of the work piece.

Key Features

• Cup point geometry bites into mating surface for strong rotational and axial resistance
• 7/8-9 UNC thread standard fits standard inch-series tapped holes
• 5-1/2 inch length accommodates deeper engagement applications
• Alloy steel construction at Grade 2 for elevated hardness and durability
• Square drive socket for positive torque transfer during installation
• Headless design allows flush or below-surface installation

Compatibility

Designed as a standard inch-series set screw for use in any tapped 7/8-9 UNC hole requiring a cup point, headless fastener in alloy steel construction.

Installation Notes

Installation should be performed by a qualified mechanic or technician using a properly sized square drive key or bit. Ensure the tapped hole is clean and free of debris before threading the screw. De-energize and lock out any associated equipment before installing or removing set screws in rotating assemblies. Do not exceed the torque capacity of the alloy steel material grade; consult applicable mechanical standards for torque guidance.