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 6145-01-438-0368
NSN 5935-00-093-7805
NSN 5945-00-784-7581
NSN 6610-00-360-2713
NSN 5835-01-386-4027
NSN 5996-00-351-2369
NSN 5999-01-513-9683
NSN 6650-00-601-6463
NSN 6650-00-820-4577
NSN 6150-01-478-0283
NSN 2925-01-364-7926
NSN 6610-00-170-6715