Value Collection 121046PR Set Screw 8-32 X 1/2 in Cone Point

Product Description

The VALUE COLLECTION 121046PR is a cup-style cone point set screw designed for secure, positive locking in mechanical assemblies. Sized at 8-32 UNC thread with an overall length of 0.5 inches, this fastener is driven with a 5/64 inch hex key and meets ASME/ANSI B18.3 and ASTM F912 standards. Manufactured from Grade 8 alloy steel, it delivers the hardness and shear strength required for high-torque or vibration-prone applications. The cone point geometry bites into mating surfaces to resist rotation and axial movement without a secondary locking element. Machinists, millwrights, and maintenance technicians install this type of fastener in shafts, collars, pulleys, and similar components.

This set screw is suited for light mechanical assemblies where a small-diameter, fine-pitch fastener is required. Typical applications include securing shaft collars, set-collar couplings, and rotating components on shafts up to approximately 0.25 inches in diameter. The cone point style is preferred when a permanent or semi-permanent bite into a soft shaft is acceptable. The fractional-inch sizing and UNC thread form make it compatible with standard American inch-series tapped holes. This fastener is sold in multiples of 100 pieces per order with a package quantity of 1.

Key Features

• Grade 8 alloy steel construction for high hardness and shear resistance
• Cone point geometry provides positive engagement and axial locking in shaft applications
• 5/64 inch hex drive for precise torque application with standard hex keys
• Meets ASME/ANSI B18.3 and ASTM F912 dimensional and material standards
• 8-32 UNC thread form compatible with standard American inch-series tapped holes
• Compact 0.5 inch overall length suits space-constrained assemblies

Compatibility

Designed as a standard replacement or stock fastener for any application requiring an 8-32 UNC cone point set screw with a 5/64 inch hex drive conforming to ASME/ANSI B18.3 and ASTM F912.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance technicians using a calibrated 5/64 inch hex key. Ensure the mating tapped hole is clean and free of debris before threading the fastener in. De-energize and lock out any rotating equipment before servicing shaft-mounted components. Do not exceed the rated drive torque for the 8-32 thread size, and avoid reusing cone point set screws that show visible deformation at the point.