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 6650-01-076-5232
NSN 5920-00-957-2067
NSN 5915-00-492-7867
NSN 5925-01-646-0722
NSN 5895-00-617-6340
NSN 5930-00-567-7033
NSN 5990-01-047-2352
NSN 7035-00-371-7749
NSN 5915-01-430-5005
NSN 6620-01-578-7561
NSN 5990-01-421-3325
NSN 5895-00-001-7072