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 5930-01-258-4409
NSN 6145-00-435-9296
NSN 5998-00-191-5303
NSN 5945-01-218-0804
NSN 6610-00-807-4761
NSN 6685-01-359-5732
NSN 5935-00-285-2767
NSN 7035-01-182-1086
NSN 5965-01-571-0309
NSN 6610-00-866-6096
NSN 5910-00-319-2719
NSN 5965-01-616-9213