Reference usaf dwg 56b23624, for special markings
A tachometer that is driven through the media of a mechanical connection and includes provisions for fixed mounting.
NSN 5950-01-029-4169
NSN 7035-01-089-4485
NSN 5975-00-466-9359
NSN 6220-00-925-2233
NSN 6135-00-405-1989
NSN 6110-00-778-3558
NSN 5999-01-411-6203
NSN 5905-00-583-0787
NSN 5930-01-422-0361
NSN 5925-01-288-4782
NSN 5965-01-540-8711
NSN 5965-00-111-2073