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 6610-01-125-5761
NSN 6150-01-591-8833
NSN 5835-01-390-4667
NSN 5915-01-529-9418
NSN 6610-01-589-5146
NSN 6110-01-449-5149
NSN 6645-01-370-4259
NSN 6240-01-412-0063
NSN 5905-01-085-8532
NSN 7035-00-922-5700
NSN 5895-01-049-0891
NSN 6150-01-382-5837