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 6610-00-774-5656
NSN 5996-01-227-2555
NSN 6145-00-148-5748
NSN 5915-01-119-8051
NSN 5998-00-472-2494
NSN 5998-01-025-6764
NSN 5950-01-429-3376
NSN 6240-01-550-8991
NSN 5915-01-578-7264
NSN 5960-01-338-3412
NSN 6150-01-307-5173
NSN 5998-00-052-4024