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 5960-01-453-6170
NSN 6130-00-306-0161
NSN 5965-01-415-3865
NSN 5998-01-562-7139
NSN 6110-01-139-2918
NSN 5915-01-633-9845
NSN 5960-00-525-1898
NSN 6105-00-257-2505
NSN 5990-01-633-9503
NSN 6110-01-096-7533
NSN 5960-00-204-7506
NSN 6105-00-799-6532