Value Collection 601339PR Set Screw 1/2-13 X 5in Cup Point

Product Description

The VALUE COLLECTION 601339PR is a cup point set screw designed for mechanical assemblies where a headless fastener is required to secure a component against or onto a shaft. This screw uses a 1/4-inch hex drive and conforms to ASME/ANSI B18.3 and ASTM F912 standards, making it a recognized fastener in industrial and commercial applications. Manufactured from alloy steel, the 601339PR provides the hardness and shear strength needed for demanding clamping and locking tasks. The cup point geometry bites into the mating surface to resist rotational and axial movement. It is sized at 1/2-13 thread with an overall length of 5 inches.

This set screw suits mechanical, maintenance, and manufacturing environments where shaft collars, pulleys, gears, sprockets, and similar rotating components must be positionally fixed. The UNC 1/2-13 thread pitch is widely used in general industrial fastener applications across HVAC equipment assemblies, pump housings, and mechanical drive systems. Installation is performed by machinists, millwrights, and maintenance technicians using a standard 1/4-inch hex key. The cup point design is appropriate when moderate surface indentation on the mating shaft is acceptable.

Key Features

• Cup point geometry provides reliable grip and axial hold on shaft surfaces
• Alloy steel construction delivers high hardness and tensile strength
• 1/4-inch hex drive for standard hex key installation
• 1/2-13 UNC thread for broad compatibility with standard tapped holes
• Conforms to ASME/ANSI B18.3 and ASTM F912 fastener standards
• Headless design sits flush or below the surface to avoid interference with moving parts

Compatibility

Designed as an OEM-style replacement or service fastener for mechanical assemblies requiring a 1/2-13 UNC headless cup point set screw with a 5-inch overall length.

Installation Notes

Installation is performed by qualified machinists or maintenance technicians. Ensure the mating tapped hole is clean and free of debris before threading the screw. Use a calibrated 1/4-inch hex key and follow applicable torque guidelines from the equipment manufacturer or relevant ASME fastener standards. Always de-energize and lock out rotating equipment before accessing shaft-mounted components.