A cylindrical item usually having a flanged aperture designed to hold and mount an instrument in a predetermined position. Excludes holder, watch.
NSN 5895-01-344-0767
NSN 2925-01-309-5007
NSN 5925-01-441-9512
NSN 5895-00-989-8948
NSN 6130-01-400-6123
NSN 7035-00-238-3662
NSN 6240-01-437-9439
NSN 5930-01-412-0481
NSN 5910-01-403-2812
NSN 5990-01-020-6841
NSN 6650-00-597-7313
NSN 5960-00-043-4652