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 5920-01-147-5652
NSN 7035-01-647-9698
NSN 6650-01-100-3185
NSN 6645-00-954-4065
NSN 5935-00-050-0381
NSN 5950-00-518-4645
NSN 6620-01-265-0192
NSN 6135-01-451-2120
NSN 6610-01-547-7349
NSN 5998-01-487-5252
NSN 5950-00-628-3098
NSN 5999-00-004-9467