Value Collection 101199PR Set Screw 8-32 5/16in Cup Point

Product Description

The VALUE COLLECTION 101199PR is a cup point set screw designed for mechanical assemblies where a headless fastener is required to lock a component onto a shaft or within a bore. Sized at 8-32 UNC thread with an overall length of 5/16 inches, this screw uses a 5/64-inch hex key drive and features a cup point tip that bites into the mating surface to resist rotation and axial movement. Manufactured from Grade 8 alloy steel, it meets ASME/ANSI B18.3 and ASTM F912 standards. Machinists, maintenance technicians, and industrial mechanics commonly install these fasteners in precision mechanical and motion-control applications.

This set screw is suited for use in pulleys, collars, couplings, gears, and similar shaft-mounted components where a flush or recessed fastener is required. The cup point geometry creates a shallow indent in the shaft surface, providing reliable holding force under vibration and moderate torque loads. It is appropriate for both light industrial and general mechanical assembly environments.

Key Features

• Cup point tip bites into shaft surface for strong rotational and axial resistance
• Grade 8 alloy steel construction for high tensile and proof load strength
• 8-32 UNC thread for broad compatibility with standard tapped holes
• 5/64-inch hex key drive for installation in tight or recessed locations
• Meets ASME/ANSI B18.3 and ASTM F912 dimensional and mechanical standards
• Headless design sits flush or below surface to eliminate snag points

Compatibility

Designed as a standard 8-32 UNC cup point set screw for use in any tapped hole or threaded insert conforming to 8-32 UNC thread specifications in industrial and mechanical assemblies.

Installation Notes

Installation is performed using a 5/64-inch hex key or Allen driver. Ensure the receiving thread is clean and free of debris before driving the screw. Do not exceed the rated torque range for Grade 8 alloy steel set screws in this thread size, and verify the mating shaft material is suitable for cup point contact before final torquing. Thread-locking compound may be applied where vibration is a concern.