3/4 NPT is only 14 tpi. It will be 3/4 U.N.F. (16 tpi)
When quoting U.N.F. or U.N.C. it is not required to quote the inclusive angle of the thread. They are all 60 degrees while the standard British threads are 55 degrees.
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Bluebell
Carrier Armoured O.P. No1 Mk3 W. T84991
Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6.
Dodge WC55. 37mm Gun Motor Carriage M6
Jeep Mb #135668
So many questions....
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