Value Collection 101121PR Set Screw 5-40 X 1/2 in Cup Point

Product Description

The VALUE COLLECTION 101121PR is a cup point set screw designed for mechanical assemblies where a fastener must apply holding force against a shaft or mating surface without a protruding head. Manufactured from Grade 8 alloy steel, this screw offers high tensile and torsional strength suited to demanding industrial and mechanical applications. The 5-40 UNC thread and 1/2-inch overall length make it a compact fastener for tight-clearance assemblies. Drive is a 1/16-inch hex socket, requiring a matching hex key for installation and removal. It meets ASME/ANSI B18.3 and ASTM F912 standards.

This set screw is used in light mechanical assemblies, instrument hardware, small-bore collars, pulleys, gears, and similar components requiring a headless fastener. The cup point geometry bites into the mating shaft surface to resist rotation and axial movement. Applications span general manufacturing, maintenance and repair operations, and precision mechanical assemblies where a flush or recessed fastener is required. This item is sold individually but carries a minimum order quantity of 100 pieces.

Key Features

• Cup point geometry provides positive grip against shaft surfaces to resist movement
• Grade 8 alloy steel construction delivers high tensile and torsional strength
• 5-40 UNC thread standard ensures consistent thread engagement in compatible tapped holes
• 1/16-inch hex drive allows installation with a standard hex key in confined spaces
• Meets ASME/ANSI B18.3 and ASTM F912 dimensional and mechanical standards
• Headless design sits flush or below the mating surface for clean assemblies

Compatibility

Designed for use in any tapped hole with a 5-40 UNC thread, commonly found in small mechanical assemblies, collars, hubs, and instrument components requiring a headless cup point fastener.

Installation Notes

Installation requires a 1/16-inch hex key. Ensure the tapped receiving hole is clean and free of debris before threading. De-energize or fully lock out any machinery before servicing fasteners on rotating components. Do not exceed the torque capacity of the alloy steel screw by using improper drive tools or extension bars on the hex key.