Value Collection 101573PR Set Screw 1/2-13 X 7/8 in Cup Point Grade 8

Product Description

The VALUE COLLECTION 101573PR is a cup point set screw designed for secure, no-protrusion fastening in mechanical assemblies. Sized at 1/2-13 UNC thread by 7/8 inches overall length, it is driven with a 1/4-inch hex key and manufactured from Grade 8 alloy steel for high tensile strength and resistance to loosening under load. The cup point digs into the mating surface to resist rotational and axial movement, making it a reliable choice in shaft-to-hub and collar applications. Meets ASME/ANSI B18.3 and ASTM F912 standards. Licensed tradespeople and maintenance technicians working on industrial and mechanical equipment are the typical installers.

This set screw is used in applications where a flush or recessed fastener is required and a protruding head is not acceptable. Common install scenarios include locking shaft collars, pulleys, gears, and couplings onto drive shafts in light to heavy industrial equipment. The cup point style is well suited for permanent or semi-permanent assemblies where the point is intended to mar or indent the shaft surface for added holding power. Sold in minimum order quantities of 100 pieces per the supplier specification.

Key Features

• Cup point geometry bites into mating shaft surface for strong axial and rotational hold
• Grade 8 alloy steel construction provides high proof load and tensile strength
• 1/2-13 UNC thread form for broad compatibility with standard tapped holes
• 1/4-inch hex drive for use with standard Allen keys and hex bit drivers
• Meets ASME/ANSI B18.3 and ASTM F912 dimensional and material standards
• Headless design sits flush or below surface for clearance-sensitive assemblies

Compatibility

Designed as a standard OEM-style replacement or stock fastener for any tapped 1/2-13 UNC through-hole or blind-hole application requiring a headless cup point set screw per ASME/ANSI B18.3.

Installation Notes

Installation is typically performed by maintenance technicians or millwrights using a 1/4-inch hex key or Allen driver. Always de-energize and lock out the equipment before servicing shaft assemblies. Ensure the tapped hole is clean and free of debris before threading the screw to avoid cross-threading. Do not exceed the rated torque range for the thread size and grade as specified by applicable ASME or equipment manufacturer guidelines.