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 5950-01-419-6772
NSN 5920-01-658-8794
NSN 5930-00-410-3203
NSN 5998-01-530-8267
NSN 6130-00-334-9227
NSN 6240-01-220-6066
NSN 6645-01-571-8578
NSN 5930-01-198-7128
NSN 5920-01-039-6118
NSN 5930-01-028-1076
NSN 6645-01-435-6373
NSN 2925-00-516-8841