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 6110-00-930-8191
NSN 6240-00-557-4402
NSN 6150-01-323-4700
NSN 6135-00-405-1989
NSN 5945-00-227-8581
NSN 2925-01-446-6523
NSN 5996-01-470-8726
NSN 6620-01-078-6372
NSN 7035-01-100-2796
NSN 5945-00-128-2972
NSN 4140-01-559-4982
NSN 5985-01-309-8682