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 6130-01-196-0607
NSN 5895-01-331-3241
NSN 6620-01-128-3053
NSN 5910-01-042-0536
NSN 5999-01-259-5632
NSN 5925-01-210-1678
NSN 4140-01-076-3720
NSN 6650-01-458-7812
NSN 5945-01-370-4784
NSN 5910-00-817-3313
NSN 5920-01-563-8345
NSN 6685-01-579-3636