A cylindrical item usually having a flanged aperture designed to hold and mount an instrument in a predetermined position. Excludes holder, watch.
NSN 5990-01-250-4198
NSN 5950-01-066-2006
NSN 5925-00-966-7171
NSN 6685-01-202-4050
NSN 5996-01-061-5142
NSN 5975-01-125-5251
NSN 5945-01-592-3379
NSN 6320-01-143-3597
NSN 6145-00-915-4179
NSN 6110-00-581-4445
NSN 2925-00-333-4702
NSN 7035-00-018-0350