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 6645-00-983-2046
NSN 5905-00-614-5643
NSN 5910-00-240-9879
NSN 5905-01-123-8138
NSN 6130-00-226-0417
NSN 5910-01-089-9785
NSN 6320-00-925-0558
NSN 6105-01-080-5934
NSN 2925-01-133-8128
NSN 5915-01-510-9763
NSN 5920-01-085-4891
NSN 6620-00-239-6153