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 6240-00-910-3297
NSN 5998-01-497-1450
NSN 2925-01-196-6187
NSN 5960-01-466-4153
NSN 5915-01-654-0965
NSN 4140-01-609-5126
NSN 5905-01-352-5824
NSN 5935-01-461-7008
NSN 5935-00-939-1707
NSN 6220-01-272-3177
NSN 5905-01-442-4669
NSN 6685-01-489-6174