Metric thread calculator.
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Reference data.
⌀D - Major diameter internal thread (nut).
⌀D1 - Minor diameter internal thread (nut). Despite its name, this parameter is not equal to the diameter of the hole of the nut blank before threading.
⌀D2 - Pitch diameter internal thread (nut).
⌀d - Major diameter external thread (bolt). Despite its name, this parameter is not equal to the diameter of the bolt blank before threading.
⌀d1 - Minor diameter external thread (bolt).
⌀d2 - Pitch diameter external thread (bolt).
⌀d3 - Rounded form minor diameter external thread (bolt).
P - Pitch.
H - Height of fundamental triangle.
Minor diameter internal thread (nut):
Pitch diameter internal thread (nut):
Minor diameter external thread (bolt):
Pitch diameter external thread (bolt):
Rounded form minor diameter external thread (bolt):
Height of fundamental triangle:
Thread overlap:
Height of thread:
Root radius:
