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 5945-00-318-5934
NSN 5998-01-238-7702
NSN 6145-00-135-1436
NSN 5915-00-103-2631
NSN 6220-01-090-0126
NSN 5990-01-472-2447
NSN 6150-01-317-3639
NSN 5935-01-246-4587
NSN 7035-01-563-7103
NSN 5835-00-698-9824
NSN 6685-01-415-5603
NSN 6220-01-410-8592