Sorry Scuba Steve,
I was out for a couple of days. Here is the format we use for OD NPT threads. You can use Hu's info above. This example is for a 1" - 11 1/2 NPT.
T0900G97S1800M03(THREAD)
G00G40X1.375Z.3T0909
G76P020160M08
G76X1.1219Z-.60R0.0231P570Q130F0.08696M24
Z0.3
G00G28U0
Z1.0
M05
M01
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