Value Collection 409151BR Set Screw 1-8x3 in Cup Point Alloy Steel

Product Description

The VALUE COLLECTION 409151BR is a 1-8 x 3 inch cup point set screw manufactured from Grade 2 alloy steel. It features a square drive and unified national coarse (UNC) thread standard. Set screws of this type are fully threaded fasteners with no head — they are driven flush or below the surface of a workpiece to lock a component, such as a collar or gear, onto a shaft. The cup point provides a reliable bite into the mating surface to resist rotational and axial movement. This fastener is used across industrial, mechanical, and trade applications wherever secure component-to-shaft retention is required.

This set screw is suited for mechanical assemblies, HVAC equipment, and general industrial applications where a headless, flush-mount fastener is needed. The 3 inch length and 1-8 thread size make it appropriate for heavy-duty shaft locking tasks, including large pulleys, couplings, collars, and sprockets. It is installed by a mechanic, millwright, or service technician using a square-drive bit or key. Grade 2 alloy steel construction provides solid tensile strength for moderate-to-heavy load applications in non-corrosive environments.

Key Features

• Cup point geometry bites into shaft surface for secure axial and rotational retention
• Square drive type for positive tool engagement with minimal cam-out risk
• UNC thread standard for broad compatibility with standard inch-series tapped holes
• Grade 2 alloy steel construction for moderate-to-heavy load capacity
• Headless design allows flush or recessed installation in workpiece
• Fractional inch sizing: 1-8 thread x 3 inch length under head

Compatibility

Designed for use in any standard 1-8 UNC tapped hole application requiring a cup point set screw. Suitable as a direct replacement or new installation in mechanical assemblies using inch-series fastener standards.

Installation Notes

Installation is performed using a square-drive bit or key of the appropriate size. Ensure the tapped hole is clean and free of debris before threading the screw. Torque to the assembly specification for the application — do not exceed the rated capacity of the alloy steel grade. Follow applicable mechanical and equipment service procedures and de-energize or lock out any equipment before fastener service.