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 5950-01-466-6118
NSN 5985-01-028-9247
NSN 6620-01-475-4717
NSN 6645-01-047-3026
NSN 5990-01-527-7640
NSN 5960-01-279-2589
NSN 6150-01-174-7279
NSN 6150-01-420-5562
NSN 6650-01-024-9554
NSN 5930-00-450-2151
NSN 7035-01-076-4067
NSN 5910-01-044-7485