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 6610-00-241-9007
NSN 5965-00-768-4366
NSN 5915-01-633-9845
NSN 5945-00-529-0103
NSN 5985-01-258-5869
NSN 6220-01-578-6554
NSN 6650-01-547-4342
NSN 6220-01-485-2381
NSN 6320-00-343-1798
NSN 6620-00-100-4517
NSN 6150-00-518-2743
NSN 5915-00-707-2297