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 5945-00-090-8254
NSN 5990-00-978-4936
NSN 6130-01-189-5050
NSN 5915-00-929-2941
NSN 5910-00-339-2198
NSN 5920-01-558-9025
NSN 6150-00-945-2251
NSN 6110-00-911-0446
NSN 6650-01-298-0976
NSN 6645-01-605-8796
NSN 6135-00-838-7008
NSN 6150-01-660-4226