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 5965-01-012-1065
NSN 5998-01-359-1944
NSN 5925-00-515-2438
NSN 5998-01-204-7649
NSN 6620-01-023-2938
NSN 6620-00-137-0332
NSN 5835-01-373-9506
NSN 6220-01-619-9929
NSN 5950-00-362-0644
NSN 5935-00-980-3928
NSN 5895-00-437-5955
NSN 5990-01-200-7460