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 7035-00-679-9027
NSN 5945-01-356-4135
NSN 5835-00-523-0736
NSN 5945-00-558-9155
NSN 5985-01-141-7059
NSN 5905-01-216-1001
NSN 6135-00-248-4102
NSN 6110-00-185-8147
NSN 5835-00-155-1379
NSN 6645-00-221-7071
NSN 6240-00-713-0237
NSN 5905-01-139-4377