Value Collection 101389PR Set Screw 5/16-18 X 5/8 in Cup Point

Product Description

The VALUE COLLECTION 101389PR is a cup point set screw designed for secure, no-protrusion fastening in mechanical assemblies. It features a 5/16-18 UNC thread with an overall length of 5/8 inches and is manufactured from Grade 8 alloy steel, providing high tensile strength and resistance to loosening under load. The cup point tip bites into the mating surface to resist rotation and axial movement. A 5/32-inch hex drive accepts a standard hex key for installation and removal. This fastener meets ASME/ANSI B18.3 and ASTM F912 dimensional and performance standards. Machinists, maintenance technicians, and assembly professionals use this type of fastener across a broad range of industrial and mechanical applications.

Cup point set screws are used extensively in shaft-to-hub connections, collars, pulleys, gears, and similar assemblies where a flush or recessed fastener is required. The 5/16-18 thread size and 5/8-inch length make this screw appropriate for moderate-duty clamping applications in light industrial equipment, HVAC drive components, pump assemblies, and general mechanical fabrication. This screw is sold individually but must be ordered in multiples of 100.

Key Features

• Grade 8 alloy steel construction for high tensile and torsional strength
• Cup point tip bites into mating surface to resist rotation and axial displacement
• 5/32-inch hex drive compatible with standard hex keys and L-wrenches
• UNC 5/16-18 thread for broad compatibility with inch-series tapped holes
• Meets ASME/ANSI B18.3 and ASTM F912 standards for dimensional accuracy and mechanical performance
• Headless design sits flush or recessed, eliminating protrusion hazards

Compatibility

Designed as a standard inch-series set screw for use in any 5/16-18 UNC tapped hole requiring a cup point, headless configuration per ASME/ANSI B18.3.

Installation Notes

Installation is performed with a 5/32-inch hex key or L-wrench. Ensure the receiving hole is cleanly tapped to 5/16-18 UNC before driving the screw. Power down and de-energize any rotating equipment before accessing shaft collars or drive components. Do not exceed the torque capacity of the alloy steel fastener or the tapped material.