Cleveland C55577 Spiral Flute Tap 10-32 Unc Hss Tin

Product Description

The CLEVELAND C55577 is a spiral flute plug tap designed for cutting internal threads in blind holes. Built from high speed steel with a titanium nitride (TiN) coating, this tap handles demanding applications in stainless steel and carbon steel. The 3-flute, right-hand spiral design features a 52-degree helix angle that efficiently evacuates chips upward and out of the hole during threading. Sized for 10-32 UNC threads with an H3 thread limit and a 2B class of fit, it is well suited for precise, production-quality tapping work performed by machinists and maintenance technicians.

This tap is intended for blind hole threading applications where chip removal is critical to thread quality and tool life. The fast flute style and high helix angle make it particularly effective when working with stainless steel and steel in tight-tolerance assemblies. At 2.375 inches overall length with a 0.194-inch shank diameter and a 0.5-inch thread length, the C55577 fits standard tap holders used in manual and CNC machining environments. It is sold individually and packaged as a single unit.

Key Features

• 52-degree helix angle with fast flute style for efficient upward chip evacuation in blind holes
• TiN coating extends tool life and reduces friction in stainless steel and steel applications
• H3 thread limit maintains consistent 2B class of fit tolerances
• Right-hand flute and right-hand thread configuration for standard tapping operations
• High speed steel construction provides toughness across a range of work materials
• No coolant-through feature — suitable for standard external coolant or cutting oil application

Compatibility

Designed for use in standard tap holders accepting a 0.194-inch shank diameter. Rated for threading stainless steel and steel in blind hole configurations requiring 10-32 UNC threads at a 2B class of fit.

Installation Notes

Installation and use of this tap should be performed by qualified machinists or maintenance technicians familiar with tapping procedures. Always secure the workpiece and use appropriate cutting fluid or tapping oil before beginning the threading operation. Ensure the tap is aligned perpendicular to the workpiece surface to avoid tap breakage or cross-threading. For blind holes, confirm hole depth is sufficient to accommodate the chamfer and thread length before tapping.