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 6130-01-559-5609
NSN 6110-00-231-7248
NSN 5920-00-682-0500
NSN 5999-01-328-8348
NSN 4140-01-318-3087
NSN 5950-00-501-6250
NSN 6620-00-787-6683
NSN 5996-01-523-8746
NSN 6240-01-469-6469
NSN 5950-00-707-7997
NSN 2925-01-556-0333
NSN 5935-00-584-1397