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 5910-01-506-0313
NSN 6145-00-201-1330
NSN 6110-00-933-9588
NSN 5915-00-767-1758
NSN 2925-01-009-3411
NSN 5895-01-576-9881
NSN 6650-01-108-6629
NSN 5910-00-994-0402
NSN 5855-01-141-8227
NSN 6145-00-264-2137
NSN 6650-00-839-2527
NSN 5935-00-031-2939