Value Collection 101381PR Set Screw 5/16-18 X 5/16 in Cup Point

Product Description

The VALUE COLLECTION 101381PR is a cup point set screw designed for secure, torque-resistant fastening in mechanical assemblies. Manufactured from Grade 8 alloy steel, this screw delivers high tensile strength suitable for demanding industrial and trade applications. The cup point bites into the mating surface to resist axial and rotational movement without requiring a through-hole. Drive is a 5/32-inch hex socket, compatible with standard hex keys and Allen wrenches. This fastener measures 5/16-18 thread size by 5/16-inch overall length and meets ASME/ANSI B18.3 and ASTM F912 standards. It is installed by maintenance technicians, millwrights, and mechanical contractors.

This set screw is suited for use in shaft-to-hub connections, collars, pulleys, sprockets, and similar mechanical assemblies where a headless fastener is required. The 5/16-18 UNC thread pattern fits standard tapped holes in that specification. Applications span light industrial equipment, HVAC blower assemblies, pump shafts, and general mechanical assemblies where a positive hold on a shaft or flat is needed. The cup point design is appropriate where minor surface marking of the mating part is acceptable.

Key Features

• Grade 8 alloy steel construction for high tensile and torsional strength
• Cup point geometry bites into mating surface to resist rotation and axial movement
• 5/16-18 UNC thread for compatibility with standard tapped holes
• 5/32-inch hex socket drive works with common hex keys and Allen wrenches
• Meets ASME/ANSI B18.3 and ASTM F912 dimensional and material standards
• Headless design sits flush or below surface to avoid snagging or interference

Compatibility

Designed as a standard replacement or new-installation set screw for any assembly with a 5/16-18 UNC tapped hole requiring a cup point, headless fastener per ASME/ANSI B18.3.

Installation Notes

Set screws are typically installed by millwrights, maintenance technicians, or mechanical contractors using a calibrated hex key or Allen driver. De-energize and lock out all rotating equipment before installing or removing set screws. Apply thread-locking compound if vibration is a concern and torque to the fastener specification listed in the applicable engineering standard. Do not substitute a worn or undersized hex key, as rounding the socket will damage the fastener.