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 5905-01-463-3737
NSN 6320-01-512-2031
NSN 5998-01-004-0067
NSN 6105-01-255-9164
NSN 5905-00-187-0210
NSN 5910-01-384-6982
NSN 5920-01-283-1093
NSN 5935-01-509-5279
NSN 6145-01-128-5235
NSN 6220-01-422-5902
NSN 5915-01-502-5840
NSN 6610-01-522-3345