KATO STI Taps

KATO offers STI Taps in four styles:

• Standard Plug (4-Thread Chamfer): Easy starting for through-holes and blind holes.
• Standard Bottoming (2-Thread Chamfer): Ideal for blind holes that are drilled to a minimum depth.
• Spiral Pointed Plug (4-Thread Chamfer): Free-cutting for use in long through-holes and in blind holes with chip clearance.
• Spiral Flute Bottoming (2-Thread Chamfer): Pulls chips out of deep or blind holes in soft materials. (Not available for metric sizes)

Special Notes:

• The "H" limit number (last digit in the Part Numbers below) indicates the number of 0.0005 inch increments the tap's maximum diameter is above the basic (minimum)
• The Class of Fit specifies the pitch diameter tolerance of the tapped hole, with 3B (4H for metric) being the tighter range usually specified in military & aerospace applications, and when consistent locking torque is desired when using KATO locking CoilThread Inserts.  Class 2B (5H for metric) taps provide a broader tolerance range or looser fit, and are normally specified in commercial & industrial applications. The class of fit of the installed insert is controlled by the class of fit of the tap.