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 5925-01-373-1040
NSN 5999-00-770-0343
NSN 6135-01-199-1185
NSN 5855-01-308-0955
NSN 6620-00-955-0330
NSN 6240-01-422-3461
NSN 5920-01-425-1780
NSN 6685-01-134-4981
NSN 2925-00-388-8932
NSN 6650-01-223-7607
NSN 6240-01-633-9357
NSN 5996-00-842-2023