Value Collection 409049PR Set Screw 1/4-20 X 1-1/4 in Cup Point

Product Description

The VALUE COLLECTION 409049PR is a cup point set screw designed for mechanical fastening applications where a threaded fastener must apply holding force without a protruding head. This screw features a 1/4-20 UNC thread and measures 1-1/4 inches in length, measured under the head. Manufactured from Grade 2 alloy steel, it offers the hardness and shear strength required for locking shafts, collars, pulleys, and similar components in fixed positions. The square drive type allows for reliable torque application using a standard square-socket key. Installation is performed by mechanical tradespeople and machinists in both production and field-service settings.

This set screw is used across a wide range of industrial and mechanical applications, including HVAC equipment assemblies, pump and motor shaft collars, conveyor components, and general machine elements. The cup point geometry bites into the mating surface to resist rotational and axial movement under load. The 1/4-20 UNC thread is one of the most common inch-series thread standards, making this screw broadly applicable in equipment manufactured to fractional-inch specifications.

Key Features

• Cup point geometry provides reliable bite into shaft or mating surface to resist axial and rotational movement
• Square drive type allows positive torque engagement with a square-socket key
• 1/4-20 UNC thread standard ensures broad compatibility with inch-series tapped holes
• Grade 2 alloy steel construction provides hardness suitable for shaft-locking duty
• Headless design sits flush or below the surface to eliminate snagging hazards
• Length measured under head: 1-1/4 inches

Compatibility

Designed as a standard replacement or stock fastener for any application requiring a 1/4-20 UNC cup point set screw with a 1-1/4 inch length and square drive.

Installation Notes

Installation is typically performed by machinists, mechanical technicians, or HVAC service professionals using a square-socket key of the appropriate size. Ensure the mating shaft or component is clean and free of burrs before seating the screw. De-energize or lock out any rotating equipment before inserting or adjusting set screws. Torque to the specification listed in the equipment manufacturer's documentation; do not over-torque, as this can damage alloy steel threads or deform the mating surface.