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 6110-01-265-1080
NSN 7035-01-429-7954
NSN 7035-00-616-4410
NSN 5950-00-383-2826
NSN 5905-00-148-3790
NSN 6220-01-466-4346
NSN 5835-00-357-9544
NSN 5965-00-167-1255
NSN 5915-01-550-9703
NSN 6130-01-140-8723
NSN 2925-00-890-9837
NSN 5999-00-466-3226