Value Collection 601087PR Set Screw 4-40 X 3/4 in Cup Point

Product Description

The VALUE COLLECTION 601087PR is a Grade 8 alloy steel set screw designed for secure, non-permanent fastening in mechanical assemblies. Featuring a cup point tip, this screw bites into mating surfaces to resist rotation and axial movement without the need for a protruding head. The hex socket drive accepts a 0.05-inch hex key for installation in tight or recessed spaces. It meets ASME/ANSI B18.3 and ASTM F912 standards, making it a reliable choice for precision assemblies where dimensional consistency and material strength are critical. Machinists, millwrights, and maintenance technicians commonly install these fasteners in pulleys, collars, and shaft-mounted components.

This set screw is suited for applications in manufacturing, industrial maintenance, and mechanical repair environments where a flush or below-surface fastener is required. The 4-40 UNC thread and 3/4-inch overall length make it appropriate for use in light-duty precision components and instrument-grade assemblies. Sold individually per package with a minimum order quantity of 100 pieces, this fastener is intended for shops and technicians sourcing in bulk for ongoing production or repair work.

Key Features

• Cup point tip grips mating surfaces to prevent rotation and axial shift
• Grade 8 alloy steel construction provides high tensile and torsional strength
• Hex socket drive sized at 0.05 inches for use with standard hex keys in confined spaces
• 4-40 UNC thread standard ensures compatibility with common tapped holes in precision components
• Meets ASME/ANSI B18.3 and ASTM F912 fastener standards for dimensional and mechanical consistency
• 3/4-inch overall length suits a range of collar, pulley, and shaft-locking applications

Compatibility

Designed as a standard 4-40 UNC set screw for use in any tapped through-hole or blind hole conforming to the 4-40 thread specification, including collars, shaft hubs, and mechanical assemblies requiring a cup point fastener.

Installation Notes

Installation is typically performed by machinists or maintenance technicians using a calibrated hex key matched to the 0.05-inch drive size. Ensure the mating component is de-energized and secured before tightening. Do not over-drive the cup point, as excessive force can damage soft shaft materials or strip the thread. Follow applicable machine safety and lockout/tagout procedures before servicing any assembly containing this fastener.