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 5910-01-253-9023
NSN 5990-01-481-3080
NSN 5950-00-707-7997
NSN 5998-01-288-7526
NSN 5965-00-351-7460
NSN 6320-00-194-4252
NSN 5835-01-442-6482
NSN 5855-01-592-3128
NSN 5960-00-273-3058
NSN 6610-01-512-2025
NSN 6105-00-251-2618
NSN 5960-01-092-4762