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 6105-00-461-5960
NSN 5835-00-725-2087
NSN 2925-00-707-6770
NSN 5985-01-173-7365
NSN 5905-01-235-2000
NSN 5985-00-246-2538
NSN 5985-00-054-6374
NSN 5905-00-419-0679
NSN 4140-00-081-6814
NSN 6150-01-499-1860
NSN 6130-01-044-4162
NSN 5945-01-444-5497