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 5835-01-258-5597
NSN 5990-01-210-9788
NSN 5835-01-005-8564
NSN 5985-00-610-4025
NSN 6150-00-165-5816
NSN 5950-01-501-9768
NSN 5835-00-823-6116
NSN 5905-00-671-0625
NSN 5945-00-989-2234
NSN 5990-01-386-5561
NSN 5935-01-360-4244
NSN 5950-00-451-6498