Value Collection 111339PR Set Screw 5/16-24 X 5/16 in Knurled Cup

Product Description

The VALUE COLLECTION 111339PR is a 5/16-24 UNF alloy steel set screw with a knurled cup point, sized 5/16 inches in overall length. Manufactured to ASME/ANSI B18.3 and ASTM F912 standards, this Grade 8 fastener delivers high tensile strength suited for demanding clamping and locking applications. The knurled cup point bites into the mating surface to resist rotation and axial movement under load. Driven by a 5/32 inch hex key, it is a standard choice for machinists, millwrights, and maintenance technicians working on shafts, collars, pulleys, and similar mechanical assemblies.

This set screw is used wherever a flush or recessed fastener is needed to lock a component onto a shaft or within a bore. Typical applications include motor shaft collars, sprocket hubs, gear assemblies, and machine tool fixtures in both light industrial and heavy-duty commercial settings. The fractional inch thread size and UNF thread standard make it compatible with common inch-dimensioned mechanical components found across HVAC equipment, pumps, and general machinery.

Key Features

• 5/16-24 UNF thread for precise engagement in inch-dimensioned assemblies
• Knurled cup point provides positive grip on shaft surfaces to resist loosening under vibration
• Grade 8 alloy steel construction offers high tensile and proof load strength
• Meets ASME/ANSI B18.3 and ASTM F912 fastener standards
• 5/32 inch internal hex drive accepts standard hex keys and Allen wrenches
• Overall length of 5/16 inches suits shallow-depth collar and hub applications

Compatibility

Designed as an OEM-style replacement or standard-stock set screw for inch-dimensioned mechanical assemblies requiring a 5/16-24 UNF knurled cup point fastener.

Installation Notes

Installation is performed by machinists, millwrights, or qualified maintenance technicians using a 5/32 inch hex key or Allen wrench. De-energize and lock out all rotating equipment before installing or removing set screws in accordance with applicable OSHA lockout/tagout procedures. Do not exceed the rated torque range for Grade 8 fasteners of this thread size, and inspect the mating shaft surface for damage before seating the knurled cup point. Thread engagement and seating force should be verified per the applicable equipment manufacturer specifications.