Precise H.S.S. Spiral 3 Flute Bottom Tap, 1/4-28NF Size, H3 H Limit – 1011-8614

• H.S.S. – High Speed Steel.
• Ground from solid.
• Ground thread.
• A bottoming tap has 1-2 lead threads ground.
  They are used for continuing to thread a blind hole close to the bottom of the hole.
• It’s difficult to start threading a hole with this tap.
• Bottoming taps are not necessarily flat on the bottom, they sometimes have a 60 degree tapered point from the manufacturing process.

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