Cleveland C55383 Spiral Point Tap 10-32 Unf Ticn Hss

Product Description

The CLEVELAND C55383 is a spiral point plug tap designed for through-hole threading applications in ferrous and difficult-to-machine materials. Built from high speed steel (HSS) with a titanium carbonitride (TiCN) coating, this tap cuts a 10-32 UNF right-hand internal thread to a Class 2B fit tolerance. The TiCN finish increases surface hardness and reduces friction, extending tool life in production or service environments. With a thread length of 0.5 inches and an overall length of 2.38 inches, the C55383 fits standard tap handles and machine spindles for hand or CNC tapping operations. It carries an H3 thread limit designation.

This tap is suited for threading through-holes in cast iron, stainless steel, and carbon steel workloads encountered in manufacturing, maintenance, and repair settings. The spiral point geometry pushes chips forward ahead of the cutting action, keeping the flutes clear and reducing the risk of chip packing in through-hole work. Machinists, tool-and-die technicians, and field maintenance professionals commonly use this tap for fastener hole preparation and thread repair on 10-32 UNF hardware.

Key Features

• 10-32 UNF thread form, right-hand cut, Class 2B fit
• High speed steel construction with TiCN coating for extended tool life
• Spiral point design pushes chips forward for clean through-hole threading
• H3 thread limit for consistent tolerance control
• 2-flute configuration balances chip clearance and cutting strength
• Coolant-through design not required — suitable for standard tap lubrication methods

Compatibility

Designed for through-hole threading of 10-32 UNF fastener holes in cast iron, stainless steel, and steel workpieces. Compatible with standard tap wrenches and CNC tapping heads accepting a 0.194-inch shank diameter.

Installation Notes

This tap is installed by licensed machinists or maintenance technicians using a tap wrench, tapping head, or CNC machine spindle. Always ensure the workpiece is securely fixtured and the pilot hole diameter is correctly sized for a 10-32 thread before starting. Apply appropriate cutting fluid or tapping lubricant for the workpiece material to reduce heat and wear. Do not force the tap if resistance increases unexpectedly — back off to clear chips before continuing.