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 5975-01-269-4932
NSN 5945-01-556-0768
NSN 5996-00-406-4951
NSN 5925-01-283-8123
NSN 5910-00-403-4635
NSN 6135-00-455-2425
NSN 5895-01-088-2682
NSN 5975-01-085-9021
NSN 6650-01-552-0069
NSN 6610-01-310-0553
NSN 7035-01-235-6023
NSN 5935-00-091-9539