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 5985-01-495-6164
NSN 6135-01-441-7922
NSN 5999-01-257-1184
NSN 6105-01-565-7584
NSN 5910-00-629-8345
NSN 6650-00-952-2754
NSN 6240-01-242-0150
NSN 4140-01-647-0707
NSN 6610-00-877-3841
NSN 5996-01-299-7275
NSN 6105-01-085-6002
NSN 5960-01-205-2604