A cylindrical item usually having a flanged aperture designed to hold and mount an instrument in a predetermined position. Excludes holder, watch.
NSN 2925-00-228-8854
NSN 5925-00-334-0044
NSN 5920-01-053-7566
NSN 5999-01-089-4562
NSN 6645-01-101-2877
NSN 5855-01-627-7577
NSN 6645-00-629-9367
NSN 6610-00-827-8959
NSN 5910-01-465-5019
NSN 4140-01-291-4838
NSN 6650-01-417-9115
NSN 5920-01-304-9062