Value Collection 101115PR Set Screw 5-40 X 5/16 Cup Point Grade 8

Product Description

The VALUE COLLECTION 101115PR is a cup point set screw designed for secure shaft-to-hub and collar-to-shaft fastening applications. Manufactured from Grade 8 alloy steel, this fastener delivers the hardness and tensile strength required in high-torque and vibration-prone assemblies. The 5-40 UNC thread pitch and 5/16-inch overall length make it well suited for compact mechanical assemblies where space is limited. Drive engagement is achieved with a 1/16-inch hex key, conforming to ASME/ANSI B18.3 and ASTM F912 standards. Machinists, millwrights, and maintenance technicians rely on this grade of set screw in precision mechanical and industrial equipment installations.

This set screw is used in light-duty mechanical assemblies, instrument components, and small-bore collar and pulley applications requiring a headless, flush-mount fastening solution. The cup point geometry bites into the mating shaft surface to resist rotational and axial movement without requiring additional locking hardware. Typical installation environments include machine shops, HVAC blower assemblies, and electrical equipment with small-shaft components. This item is sold in a package quantity of one, with a minimum order quantity of 100 pieces.

Key Features

• Grade 8 alloy steel construction provides high hardness and resistance to loosening under vibration
• Cup point geometry bites into shaft surface for strong rotational and axial holding force
• 5-40 UNC thread ensures compatibility with fine-pitch tapped holes in compact assemblies
• 1/16-inch hex drive accepts standard Allen key or hex wrench tooling
• Conforms to ASME/ANSI B18.3 and ASTM F912 dimensional and material standards
• Headless design sits flush or below the surface to avoid interference with adjacent components

Compatibility

Designed as an OEM-style replacement or stock fastener for mechanical assemblies using 5-40 UNC tapped set screw holes with cup point seating.

Installation Notes

Installation requires a 1/16-inch hex key or Allen wrench. Ensure the mating tapped hole is clean and free of debris before driving the screw to avoid thread damage. Power down and de-energize any equipment before servicing fasteners in rotating or electrically live assemblies. Do not exceed the torque capacity appropriate to the 5-40 thread size and Grade 8 alloy steel rating as specified by ASME/ANSI B18.3 guidelines.