Drillco 20N144CP 11/16-11 Nitro HSS Plug Tap
Drillco 20N144CP is the eleven-sixteenths-inch, eleven-TPI option in the Nitro plug-tap range. This is a thread-size designation, so its 11/16-inch figure should not be confused with a tap-drill hole diameter or the shank dimension.
Specifications and included details
- 11/16-11 thread designation: 11/16-inch nominal diameter, 11 TPI.
- Nitro-series high-speed steel plug tap.
- Listed straight-flute construction.
- Square shank; confirm the appropriate holder opening.
Before ordering
Verify diameter, eleven-TPI pitch and the required thread direction before choosing the tool. Obtain the applicable tap-drill requirement and check holder dimensions for your setup. The product details do not consistently establish a particular coating chemistry or full-thread depth.
Product questions and answers
Does an 11/16-inch thread require an 11/16-inch predrilled hole?
Do not assume that. The designation describes nominal thread size; choose the predrilled hole from the applicable thread and tap specifications.
What does the second 11 mean?
It means eleven threads per inch, not overall length or flute count.
Does Nitro change the thread designation?
No. Nitro identifies the product range; this model remains an 11/16-11 plug tap.
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