Value Collection 601393BR Set Screw 5/8-11 X 2-1/4 in Cup Point

Product Description

The VALUE COLLECTION 601393BR is a cup point set screw designed for secure fastening applications where a headless, flush-mount fastener is required. Manufactured from alloy steel, this screw features a 5/8-11 UNC thread and measures 2-1/4 inches in overall length. It is driven by a 5/16-inch hex key and conforms to ASME/ANSI B18.3 and ASTM F912 standards. The cup point geometry bites into the mating surface to resist axial and rotational movement, making it well suited for collars, hubs, pulleys, and shaft-mounted components. Installers in mechanical, HVAC, and industrial maintenance trades reach for this fastener when a set screw position must hold under vibration or load.

This set screw is appropriate for general industrial and mechanical assembly applications where a UNC 5/8-11 thread is specified. Typical use cases include locking shaft collars, gear hubs, and sheaves in place on round stock. The cup point style is the most common point type for general clamping duty and works on both hardened and mild steel shafts. It is sized for applications calling for a longer engagement length relative to standard short-cup configurations.

Key Features

• Cup point geometry provides positive bite into shaft material to resist rotation and axial movement
• Alloy steel construction offers higher tensile strength compared to low-carbon steel fasteners
• 5/8-11 UNC thread for broad compatibility with standard inch-series tapped holes
• 5/16-inch hex key drive allows use of standard L-keys and T-handle hex drivers
• Meets ASME/ANSI B18.3 and ASTM F912 dimensional and material standards
• Headless design seats flush or below the surface for clearance-sensitive assemblies

Compatibility

Designed for use in any tapped hole with a 5/8-11 UNC thread specification, consistent with standard inch-series mechanical assemblies requiring a cup point set screw per ASME/ANSI B18.3.

Installation Notes

Installation is performed by mechanical and maintenance trades using a 5/16-inch hex key or Allen driver. De-energize and lock out any rotating equipment before installing or adjusting set screws on shaft-mounted components. Verify the mating tapped hole is clean and free of debris before threading to avoid galling the alloy steel threads. Do not use an impact driver on set screws, as overdriving can strip the hex socket or damage the mating shaft surface.