Value Collection 409105PS Set Screw 1/2-13 X 3-1/2 in Cup Point

Product Description

The VALUE COLLECTION 409105PS is a 1/2-13 x 3-1/2 inch cup point set screw manufactured from Grade 2 steel with a bright, uncoated finish. Set screws are headless fasteners that thread fully into a tapped hole to apply clamping or holding force against a shaft, collar, or mating surface. The cup point geometry concentrates load at a circular ring contact, providing positive grip without severely damaging the mating part. This screw follows Unified National Coarse (UNC) thread standards at 1/2-13, meaning 1/2 inch nominal diameter with 13 threads per inch. Machinists, millwrights, and maintenance technicians are the primary installers for this type of fastener across industrial, mechanical, and HVAC equipment applications.

This set screw is suited for use in shaft-collar assemblies, sheaves, pulleys, sprockets, couplings, and similar mechanical components where a non-protruding fastener is required. The 3-1/2 inch length provides substantial thread engagement for thicker hubs or deep-set applications. The uncoated steel finish makes it appropriate for indoor or protected mechanical environments. Minimum order quantity is 10 pieces per order.

Key Features

• Thread size 1/2-13 UNC for broad compatibility with standard tapped collars and hubs
• 3-1/2 inch length under head provides deep thread engagement for thick hub or collar applications
• Cup point geometry delivers reliable holding force with minimal shaft damage
• Grade 2 steel construction offers adequate strength for general mechanical fastening
• Bright uncoated finish suitable for dry, protected indoor installations
• Square drive type for positive wrench engagement and high torque transfer

Compatibility

Designed as a standard UNC set screw for use in any 1/2-13 tapped through-hole or blind hole application requiring a cup point, headless fastener in Grade 2 steel.

Installation Notes

Installation requires a square drive key or wrench sized to the socket. Ensure the tapped hole is clean and free of debris before threading the screw. Torque to the appropriate value per engineering specifications for Grade 2 steel fasteners of this diameter. Always de-energize and lock out any rotating equipment before servicing shaft collars or couplings that use set screws.