Value Collection R40324143 Set Screw 1/4-20 X 1 in Cup Point

Product Description

The VALUE COLLECTION R40324143 is a 1/4-20 x 1 inch cup point set screw manufactured from 18-8 stainless steel. Set screws are fully threaded fasteners with no head, used to secure a component — such as a pulley, gear, or collar — against a shaft by applying direct pressure at the point. The cup point configuration bites into the mating surface to resist rotation and axial movement. Drive is via a 1/8 inch hex key. The 18-8 stainless steel construction provides corrosion resistance suitable for wet, outdoor, and chemically exposed environments. This fastener is appropriate for mechanical assemblies across HVAC, plumbing, electrical, and general industrial applications.

Cup point set screws in the 1/4-20 UNC thread size are widely used in residential and light commercial mechanical systems. Typical applications include securing shaft collars on blower wheel assemblies, locking set positions on valve handles, and fixing knobs or cams on control linkages. The UNC thread standard ensures compatibility with standard inch-series tapped holes. Installers working on HVAC blower assemblies, pump couplings, or motor shaft components will encounter this fastener type regularly.

Key Features

• 1/4-20 UNC thread for use with standard inch-series tapped holes
• 1 inch overall length provides adequate engagement depth for medium-duty shaft locking
• Cup point geometry bites into shaft surface to resist rotation and axial load
• 18-8 stainless steel construction resists corrosion in wet and outdoor environments
• 1/8 inch hex drive accepts standard hex keys and T-handle drivers
• Headless profile sits flush or below surface for clearance-critical assemblies

Compatibility

Designed as a standard replacement or stock fastener for any assembly using a 1/4-20 UNC threaded set screw with cup point and 1/8 inch hex drive.

Installation Notes

Installation is performed with a 1/8 inch hex key or hex bit driver. Before installing or replacing set screws in rotating assemblies, de-energize the equipment and verify the shaft is stationary. Apply thread-locking compound only if specified by the equipment manufacturer, as removal difficulty increases significantly. Do not overtighten — the cup point can deform soft shaft materials such as aluminum or brass if excessive torque is applied.