ACME thread profile, form and formula for General purpose ACME screw thread.
ACME Screw Thread Profile
D = basic major diameter, internal thread D1 = basic minor diameter, internal thread D2 = basic pitch diameter, internal thread d = basic major diameter, external thread d1 = basic minor diameter, external thread d2 = basic pitch diameter, external thread P = pitch h = basic thread height
General Purpose ACME Thread Form
Stub ACME Thread Form
PDAET - Pitch diameter allowance on external thread, MDAIT - Major diameter allowance on internal thread, MDAET - Minor diameter allowance on external thread