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 5935-01-607-0743
NSN 5835-01-208-1939
NSN 6685-01-299-3373
NSN 5998-00-801-7925
NSN 6620-01-474-4951
NSN 5910-01-370-4823
NSN 6135-01-412-0404
NSN 6620-01-615-2322
NSN 7035-00-442-1869
NSN 5920-01-190-9441
NSN 5835-01-589-4735
NSN 5975-01-202-1341