Value Collection 409147BR Set Screw 7/8-9 X 5 in Cup Point

Product Description

The VALUE COLLECTION 409147BR is a cup point set screw designed for secure shaft-to-hub and collar-to-shaft locking applications across industrial, mechanical, and maintenance trade work. Manufactured from Grade 2 alloy steel, this fastener measures 7/8-9 thread size by 5 inches in length, conforming to Unified National Coarse (UNC) thread standards. The cup point geometry bites into the mating surface to resist axial and rotational movement under load. Length is measured under the head. This screw is driven with a square drive tool and is well suited for machinists, millwrights, and maintenance technicians working on rotating equipment, pulleys, gears, and mechanical assemblies.

This set screw is appropriate for use in both light and heavy industrial settings where a reliable, recessed fastener is needed to secure components on a shaft without a protruding head. The UNC thread form and alloy steel construction make it a common choice in general mechanical assembly, conveyor systems, pump shafts, and power transmission equipment. It is sold individually and can be ordered in single-unit quantities, making it suitable for repair and replacement work where only one or a few fasteners are needed.

Key Features

• Cup point tip bites into shaft surface for strong axial and rotational resistance
• 7/8-9 UNC thread for compatibility with standard inch-series tapped holes
• 5-inch length provides deep engagement for heavy-duty or thick-hub applications
• Grade 2 alloy steel construction for strength in demanding mechanical environments
• Square drive design for positive torque transfer with standard square drive tools
• Headless profile sits flush or below surface to eliminate snagging hazards

Compatibility

Designed as a standard UNC-thread cup point set screw for use in any 7/8-9 tapped hole requiring a headless fastener with a cup point tip.

Installation Notes

Set screws of this type are typically installed by machinists or maintenance technicians using a properly sized square drive bit or key. De-energize and lock out all rotating equipment before installation or removal. Ensure the tapped hole is clean and free of debris before threading the screw in. Do not exceed the torque capacity of the alloy steel material; follow applicable ASME or equipment manufacturer fastener torque guidelines for the specific application.