Value Collection 101417PR Set Screw 5/16-24 X 3/4 in Cup Point

Product Description

The VALUE COLLECTION 101417PR is a Grade 8 alloy steel cup point set screw with a 5/16-24 UNF thread and an overall length of 3/4 inches. It is driven by a 5/32-inch hex key and meets ASME/ANSI B18.3 and ASTM F912 standards. Cup point set screws are used to lock rotating components to shafts, applying concentrated point contact to resist movement under load. The Grade 8 alloy steel construction provides the high tensile strength required in mechanical and industrial fastening applications. Machinists, maintenance technicians, and field service professionals install these fasteners in equipment assemblies where secure shaft-to-hub connections are required.

This set screw is suited for use in mechanical drive assemblies, shaft collars, pulleys, gears, knobs, and similar rotating or fixed components. The cup point geometry creates an indent in the mating surface for positive locking without requiring an external nut or bolt head. The 5/16-24 UNF thread pitch is a standard fine-thread specification commonly found in precision mechanical and HVAC equipment, pump assemblies, and industrial machinery.

Key Features

• Grade 8 alloy steel construction for high tensile and torsional strength
• Cup point tip concentrates clamping force to resist rotational and axial slippage
• 5/32-inch hex drive accepts standard hex keys and Allen wrenches
• 5/16-24 UNF fine-thread for precise engagement and vibration resistance
• Compliant with ASME/ANSI B18.3 and ASTM F912 fastener standards
• Headless profile sits flush or below the mating surface to eliminate snag hazards

Compatibility

Designed as a standard 5/16-24 UNF cup point set screw suitable for shaft collars, hubs, pulleys, and mechanical assemblies requiring a headless fastener with Grade 8 alloy steel strength and ASME/ANSI B18.3 conformance.

Installation Notes

Installed by machinists or maintenance technicians using a 5/32-inch hex key or T-handle Allen wrench. Ensure the mating shaft is clean and free of burrs before tightening to allow the cup point to seat properly. De-energize or lock out any machinery before removing or replacing set screws in rotating assemblies, per OSHA lockout/tagout requirements. Do not substitute a smaller drive key, as rounding the hex socket will require extraction and replacement of the fastener.