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 5935-01-362-4664
NSN 6240-00-607-4303
NSN 5895-00-925-2423
NSN 6645-01-211-6502
NSN 6110-00-944-6287
NSN 2925-01-327-3069
NSN 5998-00-031-4796
NSN 5905-00-322-5494
NSN 5910-01-328-5376
NSN 2925-01-101-4655
NSN 4140-00-809-3602
NSN 5960-00-315-0358