6.625 regular box API threading
Tapered thread .250 pitch on Fanuc Oitc controller

does this look about right?

T0200 G40 G99
G20
X10.00 Z3.00 T0202
GO X6.100 Z.250
G76 P000060 Q0100 R.002
G76 X5.641 Z-4.625 R.388 P148 Q0100
F.250
X10.00 Z-3.00 T0200 M30