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 5905-01-570-4618
NSN 5945-01-250-0873
NSN 5996-01-655-5920
NSN 5905-00-793-8118
NSN 5935-01-099-1662
NSN 5915-00-406-0846
NSN 5920-01-362-1459
NSN 5925-01-189-9254
NSN 5985-01-255-4455
NSN 6320-00-358-1946
NSN 6150-00-453-3137
NSN 6320-01-129-9656