Value Collection 601428BR Set Screw 5/8-18 X 2-1/2 in Cup Point

Product Description

The VALUE COLLECTION 601428BR is a cup point set screw designed for mechanical assemblies where a fastener must apply concentrated holding force without a protruding head. It features a 5/8-18 UNF thread form and measures 2-1/2 inches in overall length. The cup point geometry bites into the mating surface to resist rotation and axial movement. Drive is a 5/16-inch hex socket, compatible with standard hex keys and T-handle drivers. Manufactured from alloy steel, this fastener meets ASME/ANSI B18.3 and ASTM F912 standards. It is used by millwrights, machinists, and maintenance technicians across industrial and commercial equipment applications.

Cup point set screws in this size range are commonly installed in shaft collars, shaft-to-hub connections, pulleys, sprockets, gears, and mechanical stops. The 5/8-18 UNF thread provides fine-pitch engagement suitable for assemblies requiring precise axial positioning. This screw is appropriate for both new installation and field replacement in rotating and stationary mechanical systems where a headless fastener is required to sit flush or below the surface of the mating component.

Key Features

• Cup point tip concentrates clamping load to resist shaft rotation and axial shift
• 5/8-18 UNF thread for fine-pitch engagement and precise positioning
• 5/16-inch hex socket drive compatible with standard hex keys
• Alloy steel construction for high strength in demanding mechanical environments
• Meets ASME/ANSI B18.3 and ASTM F912 fastener standards
• Headless design allows flush or sub-flush installation in shaft and hub assemblies

Compatibility

Designed as a standard-dimension replacement or new-install set screw for any mechanical assembly requiring a 5/8-18 UNF, 2-1/2-inch overall length, cup point, hex socket fastener conforming to ASME/ANSI B18.3 and ASTM F912.

Installation Notes

Installation is performed by machinists, millwrights, or qualified maintenance technicians using a calibrated hex key or T-handle driver sized to 5/16 inch. Ensure the mating shaft or surface is clean and free of burrs before seating the cup point. De-energize and lock out all rotating or powered equipment before installing or removing set screws per applicable OSHA lockout/tagout procedures. Do not exceed the torque capacity of the alloy steel fastener by using extended-length drivers or impact tools on small hex drives.