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 5965-01-388-5296
NSN 5990-01-328-2385
NSN 6610-01-649-5326
NSN 6240-00-248-6517
NSN 5925-01-414-2766
NSN 5975-00-257-8055
NSN 6650-00-342-6447
NSN 5960-00-724-7969
NSN 5985-01-616-9647
NSN 5950-00-539-1081
NSN 5999-01-381-2457
NSN 5996-01-122-8288