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 5985-00-382-0344
NSN 6135-01-482-7901
NSN 6620-01-657-6296
NSN 5996-01-534-9696
NSN 5905-00-151-4762
NSN 6645-01-370-5264
NSN 5930-01-037-5934
NSN 5920-00-081-9156
NSN 5996-01-503-0203
NSN 5855-01-103-8650
NSN 6645-01-014-9205
NSN 6645-01-210-5649