In accordance us army drawing 11b5090697
An internal threading tool with longitudinally separated cutting edges designed to form specific threads.
Classification: Tools for tapping or threading, parts thereof, of base metal
NSN 6610-00-756-2664
NSN 5905-01-461-3738
NSN 6650-01-350-5578
NSN 6150-01-464-3206
NSN 5895-01-379-2310
NSN 5855-01-079-1259
NSN 6150-00-148-3909
NSN 5975-00-489-1413
NSN 6135-01-495-0933
NSN 5998-01-422-4196
NSN 5999-01-233-6327
NSN 6240-01-468-7927