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 5925-00-812-1987
NSN 5835-01-386-4027
NSN 5855-00-138-2386
NSN 6105-01-201-8257
NSN 7035-00-327-0458
NSN 5935-00-736-1288
NSN 5996-01-013-8824
NSN 5910-01-003-7842
NSN 5930-00-470-2862
NSN 6105-01-521-2593
NSN 5895-01-096-7478
NSN 5915-01-325-6098