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 6220-00-426-5916
NSN 6685-01-482-4100
NSN 6150-01-502-9754
NSN 5895-01-337-0208
NSN 6135-00-062-5080
NSN 6620-01-192-3927
NSN 5945-00-461-1396
NSN 5945-01-204-6616
NSN 5915-00-418-3849
NSN 5975-01-408-5125
NSN 6320-01-465-2028
NSN 5945-01-219-3529