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 4140-01-336-0980
NSN 5905-00-934-9711
NSN 5835-01-012-1436
NSN 6220-00-386-0997
NSN 5996-00-842-2023
NSN 6135-01-388-2761
NSN 5950-01-543-8185
NSN 6110-01-317-2915
NSN 5930-01-004-6377
NSN 5960-01-032-4229
NSN 5910-01-231-9179
NSN 5935-01-540-5258