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 6110-01-583-4062
NSN 5975-00-229-9593
NSN 6650-00-469-6682
NSN 6620-01-339-5524
NSN 4140-00-931-9638
NSN 5975-00-083-1433
NSN 6320-00-186-6452
NSN 7035-00-140-0474
NSN 5985-01-466-6341
NSN 6610-01-093-4710
NSN 5965-01-085-6158
NSN 6220-00-978-3172