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 6650-00-518-5194
NSN 5975-01-267-6459
NSN 6320-01-607-1491
NSN 6135-01-430-3119
NSN 5910-01-442-1750
NSN 6145-01-441-2630
NSN 6150-00-873-7568
NSN 6650-01-184-9238
NSN 6135-01-101-5039
NSN 6150-01-371-2446
NSN 5975-01-600-0155
NSN 5855-00-185-1560