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 5985-01-406-6262
NSN 5925-01-594-1873
NSN 7035-00-803-3056
NSN 6610-01-421-4396
NSN 5935-00-427-4414
NSN 5925-00-262-5651
NSN 5935-01-295-9922
NSN 6650-00-717-8913
NSN 5925-01-354-7130
NSN 6145-00-448-8264
NSN 5895-00-186-3441
NSN 5998-01-603-5283