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 5835-01-568-7796
NSN 5975-01-052-1433
NSN 6240-01-261-0025
NSN 2925-01-190-3121
NSN 6220-01-551-0755
NSN 5855-00-951-6483
NSN 6150-01-009-4652
NSN 5985-01-500-0880
NSN 6320-01-229-6479
NSN 5910-00-978-4403
NSN 6650-00-300-9895
NSN 6105-01-441-4693