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 6645-01-633-1852
NSN 5935-00-643-7896
NSN 6240-00-822-4571
NSN 5930-01-445-4991
NSN 5965-01-185-2026
NSN 5905-00-872-0492
NSN 5960-00-099-9790
NSN 5998-01-054-3713
NSN 5985-01-436-5733
NSN 5975-00-361-7793
NSN 6150-01-561-3704
NSN 5930-00-918-6150