A color free item of transparent or translucent material, usually optical glass, having specific light dispersive and refractive properties. This item must have two plane-parallel surfaces and is designed for use in an optical instrument to provide a barrier to foreign matter and/or permit light transmission in or to the optical system.
Classification: Military equipments not identified by kind
NSN 5915-00-971-5626
NSN 5930-01-227-4474
NSN 5920-01-183-3125
NSN 5910-01-616-6447
NSN 5835-01-337-2793
NSN 6150-01-193-1799
NSN 5999-01-349-5628
NSN 5935-01-237-1434
NSN 7035-01-516-4516
NSN 6110-00-157-1699
NSN 2925-00-546-3129
NSN 5985-01-587-7991