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 5960-00-474-0095
NSN 6645-01-608-6471
NSN 5895-01-061-1115
NSN 6645-01-193-9839
NSN 5998-00-516-4111
NSN 5965-01-321-3744
NSN 5999-00-505-5586
NSN 6135-00-782-6988
NSN 4140-01-515-1121
NSN 4140-01-586-5845
NSN 5998-01-479-2449
NSN 5990-00-234-9136