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 4140-01-159-2639
NSN 5925-01-401-5314
NSN 6620-01-617-3915
NSN 6130-00-141-8317
NSN 5950-01-556-7989
NSN 5835-01-187-8986
NSN 6320-01-204-2922
NSN 5935-01-648-0457
NSN 6105-01-069-7826
NSN 6610-01-649-5326
NSN 6240-01-470-7706
NSN 6105-01-227-4527