Value Collection MP40377 Set Screw 5/16-18 X 1/2 in Cup Point 50pk

Product Description

The VALUE COLLECTION MP40377 is a cup point set screw designed for mechanical assemblies requiring a secure, non-protruding fastener. Sized at 5/16-18 UNC thread by 1/2 inch overall length, this screw is manufactured from Grade 8 alloy steel for high tensile strength and resistance to shear forces. The cup point geometry bites into the mating surface to resist rotational and axial movement without the need for a bolt head. Driven with a 5/32 inch hex key, it conforms to ASME/ANSI B18.3 and ASTM F912 standards. Machinists, millwrights, and maintenance technicians install these screws in shaft collars, shaft couplings, pulleys, and similar mechanical components.

This set screw is suited for general industrial and maintenance applications where a headless fastener is required to lock a component onto a shaft or within a bore. The UNC thread form makes it compatible with standard inch-system tapped holes. It is commonly used in HVAC equipment assemblies, rotating machinery, and fabricated mechanical frames. This listing includes a pack of 50 screws, making it appropriate for shop stock or higher-volume installation work.

Key Features

• Cup point tip bites into mating surface to resist rotation and axial movement
• Grade 8 alloy steel construction for high tensile and proof load strength
• 5/16-18 UNC thread for compatibility with standard inch-system tapped holes
• 1/2 inch overall length suits medium-depth engagement applications
• 5/32 inch hex drive for use with standard Allen wrenches or hex keys
• Meets ASME/ANSI B18.3 and ASTM F912 fastener standards

Compatibility

Designed as a standard inch-series headless set screw for use in any 5/16-18 UNC tapped hole requiring a cup point fastener per ASME/ANSI B18.3.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance technicians using a 5/32 inch hex key or Allen wrench. De-energize and lock out all rotating equipment before installing or removing set screws. Verify that the tapped hole thread form and depth are clean and free of debris before driving the screw to seat. Do not substitute hex key sizes, as an undersized driver risks rounding the socket.