Irwin Hanson NF Fractional Plug Tap High Carbon Steel

Irwin Hanson NF fractional plug taps are high carbon steel hand taps. They cut internal threads in drilled holes in the National Fine (NF) thread series. Use them for general-purpose tapping, routine maintenance, repair work and re-threading where extreme thread precision and tight tolerances are not critical.

Key Features:

• High carbon steel construction for hand threading in a variety of machinable materials
• Precision-ground straight flutes for fast chip removal and efficient threading
• Plug-style chamfer starts easily in through holes. It can also thread to a moderate depth in blind holes.
• Class 2B threads for a standard-fit internal thread
• Etched markings show the tap size and recommended drill bit size for quick identification
• Made in the USA under the Hanson brand, part of the Irwin tap and die line

These fractional plug taps suit automotive, industrial, home-shop and general workshop use. They are a practical choice for cleaning up damaged threads or creating new NF threads by hand.