Value Collection 101703BR Set Screw 7/8-9 X 3 in Cup Point

Product Description

The VALUE COLLECTION 101703BR is a cup point set screw designed for secure, flush-mounted fastening in mechanical assemblies. Measuring 7/8-9 thread size by 3 inches in overall length, this fastener is driven with a 1/2-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 rotation and axial movement under load. Constructed from alloy steel, it delivers the hardness and shear strength required for demanding industrial and trade applications. Machinists, maintenance technicians, and fabricators install this type of fastener regularly in shaft collars, pulleys, gears, and similar components.

This set screw is suited for use in mechanical power transmission assemblies, HVAC equipment, pump and motor shaft retention, and general industrial machinery. The UNC thread form is standard in North American trade applications. The cup point style is a common choice where a permanent or semi-permanent grip on a shaft is needed without a through-hole. Sold individually, it is appropriate for repair, replacement, or low-volume fabrication work.

Key Features

• Cup point geometry bites into shaft surface for firm axial and rotational retention
• 7/8-9 UNC thread for compatibility with standard North American tapped holes
• 3-inch overall length provides deep thread engagement in thick hubs or collars
• 1/2-inch hex drive for use with standard hex keys or Allen wrenches
• Alloy steel construction delivers hardness and shear strength for load-bearing applications
• Meets ASME/ANSI B18.3 and ASTM F912 standards

Compatibility

Designed as an OEM-style replacement or service fastener for any application requiring a 7/8-9 UNC cup point set screw with a 3-inch overall length and 1/2-inch hex drive.

Installation Notes

Installation requires a correctly sized 1/2-inch hex key or T-handle driver. Ensure the mating tapped hole is clean and free of debris before threading in the fastener. De-energize and lock out any rotating or pressurized equipment before servicing shaft-mounted components. Do not overtighten — follow the equipment manufacturer torque specifications for the given shaft diameter and material.