Value Collection 409053PR Set Screw 1/4-20 Cup Point Alloy Steel

Product Description

The VALUE COLLECTION 409053PR is a 1/4-20 x 2-1/4 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, pulley, gear, or sprocket — against a shaft by applying clamping force at the cup point contact. This screw uses a square drive and a UNC thread standard. The cup point tip bites into the mating surface to resist rotation and axial movement. It is used across industrial, mechanical, and trade applications wherever a low-profile, flush-mount fastening method is required.

This set screw is suited for use in mechanical assemblies found in HVAC equipment, motors, pumps, fans, and general industrial machinery. The 1/4-20 UNC thread is one of the most common fractional thread sizes in North American equipment, making this screw a frequent replacement or stock item for maintenance technicians and millwrights. The 2-1/4 inch length provides deep thread engagement suitable for thicker hubs or bosses. Length is measured as the full usable thread length under the drive end.

Key Features

• Cup point tip provides positive bite into shaft or mating surface for secure clamping
• Square drive for high torque application without drive cam-out
• 1/4-20 UNC thread — common fractional size for wide cross-equipment compatibility
• 2-1/4 inch length provides deep engagement in thick hubs or collars
• Grade 2 alloy steel construction for mechanical strength in demanding service
• Fully threaded, headless design allows flush or below-surface installation

Compatibility

Designed as a standard 1/4-20 UNC cup point set screw for use in any mechanical assembly requiring this thread size, length, and drive type. No specific model or equipment compatibility was stated in the product data.

Installation Notes

Set screws are typically installed by maintenance technicians, millwrights, or licensed HVAC and mechanical contractors using a square-drive key or bit of the appropriate size. Ensure the shaft or mating component surface is clean and free of debris before seating the cup point. Apply torque gradually and evenly to avoid stripping the drive recess. Always de-energize and lock out equipment before removing or installing set screws on rotating components in accordance with applicable OSHA lockout/tagout procedures.