Value Collection 409214PR Set Screw 9/16-12 X 3 in Cup Point

Product Description

The VALUE COLLECTION 409214PR is a 9/16-12 x 3 inch cup point set screw manufactured from Grade 2 alloy steel. Set screws are fully threaded fasteners with no head, designed to secure a component — such as a collar, gear, or pulley — against or onto a shaft by bearing the cup point directly into the shaft surface. The square drive socket accepts a square-key wrench for high-torque installation in confined spaces. This screw follows UNC thread standards and uses a length-under-head measurement convention. It is a general industrial fastener installed by machinists, millwrights, and maintenance technicians across a wide range of mechanical assemblies.

Cup point set screws in this size range are common in industrial machinery, power transmission components, shaft collars, and mechanical assemblies where a positive, bite-in hold is required. The 9/16-12 UNC thread and 3 inch length suit medium-to-heavy shaft diameters where deeper thread engagement and extended point contact are needed. This fastener ships in a minimum order quantity of 5 pieces, making it suitable for maintenance stock or small assembly runs in manufacturing, industrial service, and mechanical contracting environments.

Key Features

• Cup point tip bites into shaft surface for positive rotational and axial hold
• Square drive socket allows high-torque installation with a square-key wrench
• 9/16-12 UNC thread standard for broad tool and tap compatibility
• 3 inch length provides extended thread engagement for deeper shaft applications
• Grade 2 alloy steel construction for strength in general industrial use
• Fully threaded, headless design fits flush or below surface in tapped holes

Compatibility

Designed as a standard UNC-thread cup point set screw for use in any tapped hole accepting a 9/16-12 thread, including shaft collars, shaft couplings, pulleys, gears, and other power transmission components requiring a headless fastener.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance technicians using a square-key wrench sized for the drive socket. Always de-energize and lock out the associated machinery before installing or removing set screws from rotating components, following applicable LOTO procedures. Do not overtighten beyond the point of firm shaft contact, as cup point penetration depth affects shaft integrity. Inspect threads and mating tapped holes for damage before installation.