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 6105-00-081-9090
NSN 6130-00-280-3696
NSN 5835-01-397-1585
NSN 6220-01-513-0060
NSN 4140-01-481-7738
NSN 6130-00-862-5516
NSN 5935-01-015-4498
NSN 5895-00-896-0503
NSN 5905-00-104-9920
NSN 6145-01-612-4981
NSN 6610-01-581-2975
NSN 5998-01-173-8480