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 7035-00-124-9383
NSN 5895-00-236-3294
NSN 5999-00-960-0201
NSN 5945-00-800-1616
NSN 5950-01-033-0890
NSN 2925-01-500-0730
NSN 6135-01-359-5798
NSN 5935-00-314-4509
NSN 5975-01-469-6856
NSN 5985-01-642-0167
NSN 5895-00-349-8999
NSN 4140-00-707-5963