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 6130-00-662-8557
NSN 7035-01-656-0502
NSN 5998-00-291-0687
NSN 4140-01-500-3939
NSN 6220-00-276-8681
NSN 5985-01-198-0897
NSN 6620-01-640-6761
NSN 5895-01-050-8392
NSN 6130-01-391-6087
NSN 6150-01-229-2562
NSN 5945-01-462-1555
NSN 5950-01-479-3827