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 5975-01-660-7634
NSN 5835-01-112-9008
NSN 5935-01-625-2019
NSN 5920-01-212-1536
NSN 5935-01-300-6013
NSN 5910-00-786-1581
NSN 6685-01-448-3204
NSN 6610-01-243-8506
NSN 6150-01-244-3885
NSN 6685-01-202-7823
NSN 6320-01-093-5738
NSN 6135-01-222-0703