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 5985-00-100-1296
NSN 6145-01-399-5148
NSN 6105-01-537-1195
NSN 5905-01-616-8845
NSN 5920-00-317-2219
NSN 5945-00-825-4630
NSN 5930-01-631-5556
NSN 5935-00-269-5516
NSN 5905-01-382-6338
NSN 6150-01-011-3428
NSN 6220-00-935-6881
NSN 5935-00-426-8297