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 5945-00-964-8677
NSN 5990-01-617-5156
NSN 5925-00-724-5554
NSN 5975-00-204-9190
NSN 5945-01-112-2864
NSN 6105-01-243-0371
NSN 6130-00-818-6171
NSN 6610-00-584-5055
NSN 5910-01-026-6322
NSN 5855-00-532-0025
NSN 4140-01-626-9805
NSN 5950-00-221-0848