Value Collection 601356PR Set Screw 1/2-20 X 1-3/4 in Cup Point

Product Description

The VALUE COLLECTION 601356PR is a 1/2-20 cup point set screw manufactured from alloy steel to ASTM F912 and ASME/ANSI B18.3 standards. Set screws are headless fasteners that seat fully within a threaded hole to lock a component — such as a collar, gear, or pulley — onto a shaft without protruding beyond the mating surface. The cup point bites into the shaft surface to resist rotation and axial movement under load. At 1-3/4 inches in overall length with a 1/4-inch internal hex drive, this fastener is a standard choice for mechanical assemblies across HVAC equipment, pump sets, fan wheels, and general industrial applications. Licensed trades and maintenance technicians install these as part of routine equipment assembly and repair.

This set screw is suited for use wherever a threaded locking fastener is required to secure a rotating or stationary component to a shaft. The 1/2-20 UNF thread gives fine-pitch engagement suitable for applications requiring precise clamping adjustment. The cup point geometry concentrates clamping force at the shaft contact area, making it appropriate for both hardened and unhardened shaft materials. Typical install scenarios include fan blade hubs, motor shaft collars, valve stems, and mechanical drive components found in residential and light commercial mechanical systems.

Key Features

• Cup point concentrates holding force on shaft surface, resisting rotation and axial shift
• 1/2-20 UNF fine-thread form for precise torque-down and secure engagement
• 1-3/4 inches overall length provides deep thread engagement in thick hubs or collars
• 1/4-inch hex key drive — compatible with standard Allen wrenches and hex bit drivers
• Alloy steel construction meets ASTM F912 material and mechanical property requirements
• Conforms to ASME/ANSI B18.3 dimensional standards for interchangeability

Compatibility

Designed as a standard ASME/ANSI B18.3 replacement or stock set screw for any 1/2-20 UNF threaded application requiring a cup point headless fastener.

Installation Notes

Set screws of this type are installed and removed by licensed mechanics, HVAC technicians, and millwrights using a 1/4-inch hex key or Allen-style driver. De-energize and lock out all equipment before accessing shaft-mounted components. Thread the fastener in by hand to verify clean thread engagement before applying drive torque. Avoid cross-threading — alloy steel fasteners can seize in softer aluminum or cast-iron housings if misaligned on entry.