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 5930-00-203-4430
NSN 5998-01-268-5757
NSN 5945-00-180-8374
NSN 5930-00-528-9728
NSN 5855-01-147-6024
NSN 5985-01-461-3113
NSN 6320-00-977-3930
NSN 2925-01-337-9563
NSN 5905-01-359-5230
NSN 5910-01-320-8622
NSN 5998-00-519-5091
NSN 5965-00-848-6684