Value Collection 101593PR Set Screw 1/2-20 X 3/4 in Cup Point

Product Description

The VALUE COLLECTION 101593PR is a 1/2-20 UNF cup point set screw machined from Grade 8 alloy steel. Set screws are fully threaded fasteners with no head — they seat flush or below the surface of the work piece to lock a shaft, collar, or hub in position. The cup point configuration bites into the mating surface to resist rotational and axial movement under load. Drive is a 1/4 inch hex socket. This fastener meets ASME/ANSI B18.3 and ASTM F912 standards and is installed by machinists, millwrights, and maintenance technicians across industrial and mechanical applications.

This set screw is suited for shaft-to-hub assemblies, shaft collars, sprockets, pulleys, and similar mechanical connections where a flush-mounted locking fastener is required. The 1/2-20 fine thread pitch provides precise torque control and holding strength in applications where vibration resistance and positional accuracy matter. Overall length is 3/4 inches. Typical use cases include machine tool setups, conveyor components, and general mechanical assembly in light to heavy industrial environments.

Key Features

• 1/2-20 UNF fine thread for precise engagement and vibration resistance
• Cup point geometry bites into shaft surface to prevent rotation and axial slip
• Grade 8 alloy steel construction for high tensile and torsional strength
• 1/4 inch hex socket drive — accepts standard hex key or T-handle driver
• Meets ASME/ANSI B18.3 and ASTM F912 dimensional and material standards
• Overall length of 3/4 inches suits standard shaft collar and hub depths

Compatibility

Designed as a standard 1/2-20 UNF cup point set screw per ASME/ANSI B18.3 and ASTM F912, suitable as a replacement or stock fastener in any mechanical assembly requiring a 1/2-20 headless hex socket cup point screw in Grade 8 alloy steel.

Installation Notes

Installation is performed by machinists or maintenance technicians using a 1/4 inch hex key or T-handle driver. De-energize and lock out all rotating equipment before servicing shaft assemblies. Do not exceed the rated drive torque for the hex socket size, as over-driving can strip the socket or shear the fastener. Ensure mating threads are clean and free of burrs before installation.