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 5905-01-099-2686
NSN 5945-00-113-4302
NSN 7035-00-162-5487
NSN 6145-00-510-7319
NSN 5915-01-516-2133
NSN 5895-01-202-7921
NSN 5925-01-552-5515
NSN 6135-01-568-9107
NSN 6145-01-289-6199
NSN 6650-01-081-7040
NSN 6135-00-856-1343
NSN 6150-00-760-9395