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 5945-01-186-3194
NSN 5950-01-569-9200
NSN 6240-01-105-1399
NSN 2925-01-494-3259
NSN 2925-00-833-9466
NSN 6240-00-807-8512
NSN 5925-01-228-5413
NSN 5990-01-400-3299
NSN 5905-01-414-6970
NSN 5950-00-807-0714
NSN 5935-01-137-4512
NSN 5990-00-863-8628