A cylindrical item usually having a flanged aperture designed to hold and mount an instrument in a predetermined position. Excludes holder, watch.
NSN 6650-01-162-2881
NSN 5835-00-581-9460
NSN 6135-01-529-3789
NSN 5985-01-421-4559
NSN 6220-01-466-0877
NSN 6105-01-156-6873
NSN 6150-00-300-0395
NSN 5965-00-964-1756
NSN 2925-00-519-5292
NSN 6220-01-142-3148
NSN 6610-01-059-5271
NSN 6320-01-176-8367