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 5910-01-294-4657
NSN 5920-00-761-8062
NSN 5998-01-423-6095
NSN 5895-01-129-2411
NSN 5996-00-330-9184
NSN 6620-01-130-3139
NSN 5985-01-437-0347
NSN 6610-01-021-5068
NSN 5985-01-578-6915
NSN 5950-00-960-7625
NSN 5996-01-293-7370
NSN 5910-01-423-8643