A cylindrical item usually having a flanged aperture designed to hold and mount an instrument in a predetermined position. Excludes holder, watch.
NSN 6105-01-179-2734
NSN 5915-00-813-5158
NSN 6650-01-003-9355
NSN 6135-00-016-0071
NSN 6135-00-542-6728
NSN 5998-01-227-5822
NSN 5945-01-432-1139
NSN 5910-01-442-4216
NSN 5835-01-323-2581
NSN 2925-00-449-2478
NSN 5998-00-404-7902
NSN 5935-00-760-5117