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 6650-01-652-6067
NSN 6220-00-021-9040
NSN 5930-00-614-8772
NSN 6130-01-444-3909
NSN 5910-00-952-2996
NSN 5915-01-329-7862
NSN 6150-01-269-8493
NSN 5915-01-318-0720
NSN 5960-00-529-2704
NSN 7035-00-908-4933
NSN 7035-00-541-8516
NSN 5930-01-324-2263