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 2925-01-381-5307
NSN 6620-01-109-2764
NSN 5835-00-431-4451
NSN 4140-01-384-0444
NSN 5999-01-271-6910
NSN 6105-01-578-4144
NSN 5960-00-688-3940
NSN 5835-01-485-0210
NSN 5910-01-437-2498
NSN 6240-01-383-8579
NSN 5905-00-142-3831
NSN 5945-01-223-6334