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 5998-01-167-4832
NSN 6320-00-646-3311
NSN 6220-00-925-0522
NSN 6110-01-062-2208
NSN 5990-01-066-5227
NSN 6645-01-537-0839
NSN 6650-01-278-6645
NSN 5835-01-133-4197
NSN 5990-01-233-6699
NSN 6105-00-500-3210
NSN 6240-01-173-2985
NSN 5925-01-436-4943