Product Description
Manufacturer part number: 1011-8613
- 1/4-20NC H3 3 Flute High Speed Steel Spiral Flute Bottom Tap (1011-8613)
- 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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