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 5920-01-542-8710
NSN 5975-01-556-6719
NSN 5835-01-362-0305
NSN 6220-00-958-5441
NSN 5920-01-071-1921
NSN 7035-00-349-8571
NSN 5945-00-610-5771
NSN 5855-01-437-6161
NSN 5950-01-354-8451
NSN 6130-01-633-0762
NSN 6620-01-649-7511
NSN 6620-01-641-7592