Value Collection 101073PR Set Screw 4-40 X 3/16 in Cup Point

Product Description

The VALUE COLLECTION 101073PR is a 4-40 UNC set screw with a cup point, manufactured from Grade 8 alloy steel. Set screws are fully threaded fasteners with no head — they seat flush or below the surface and are tightened with a hex key. This screw measures 3/16 inches in overall length with a 0.050-inch hex key drive. The cup point geometry bites into the mating surface to resist rotation and axial movement, making it a reliable choice for securing shaft collars, pulleys, and similar components. It conforms to ASME/ANSI B18.3 and ASTM F912 standards. Installed by machinists, maintenance technicians, and mechanical assembly professionals across industrial and trade applications.

This set screw is suited for light-duty shaft-locking and positioning applications where a small-diameter, fine-pitch fastener is required. The 4-40 thread size is common in precision instruments, small motors, electronic enclosures, and mechanical assemblies where space is limited. The minimum order quantity is 100 pieces, making this item appropriate for production environments, MRO stocking, or service operations that regularly consume small fasteners of this specification.

Key Features

• Cup point geometry bites into mating surface to resist rotation and axial displacement
• Grade 8 alloy steel construction for high tensile and torsional strength relative to fastener size
• 4-40 UNC thread standard for use in precision and light-duty mechanical assemblies
• Conforms to ASME/ANSI B18.3 and ASTM F912 fastener standards
• 0.050-inch hex key drive for installation with standard hex (Allen) wrenches
• Headless design allows flush or below-surface seating without protruding hardware

Compatibility

Designed as an OEM-style replacement or stock fastener for any application requiring a 4-40 UNC cup point set screw with a 3/16-inch overall length and 0.050-inch hex drive.

Installation Notes

Installation is performed with a 0.050-inch hex key; ensure the key is fully seated before applying torque to avoid rounding the drive socket. Power down or de-energize any rotating equipment before adjusting or replacing set screws on shafts or pulleys. Clean mating shaft surfaces of oil or debris to allow the cup point to seat properly. Follow applicable facility or equipment manufacturer guidelines for fastener preload in precision assemblies.