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 5950-00-028-4118
NSN 5920-00-771-7280
NSN 5915-00-482-2899
NSN 6240-00-284-1457
NSN 6220-00-080-2352
NSN 6135-00-078-9931
NSN 5999-01-206-4657
NSN 5835-01-276-1201
NSN 6105-01-353-0772
NSN 6620-00-970-2363
NSN 6685-01-012-2854
NSN 6240-00-580-0666