A cylindrical item usually having a flanged aperture designed to hold and mount an instrument in a predetermined position. Excludes holder, watch.
NSN 5930-00-644-3221
NSN 5835-00-138-7807
NSN 6650-01-396-8890
NSN 5998-01-525-6834
NSN 5935-01-278-1870
NSN 5960-01-029-4253
NSN 6685-00-782-6031
NSN 5999-01-062-6401
NSN 6685-00-078-7539
NSN 5950-00-199-3894
NSN 5910-00-903-4081
NSN 5930-00-540-0900