A cylindrical item usually having a flanged aperture designed to hold and mount an instrument in a predetermined position. Excludes holder, watch.
NSN 5935-01-477-3590
NSN 5945-01-521-5812
NSN 6650-01-276-4486
NSN 4140-01-172-4637
NSN 4140-01-423-1647
NSN 5910-00-932-2734
NSN 6110-00-753-7677
NSN 6620-01-530-6752
NSN 6320-01-364-1732
NSN 2925-00-221-8529
NSN 6610-01-593-0135
NSN 6610-00-284-3093