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 5910-01-364-0513
NSN 6135-01-014-9755
NSN 5935-01-428-7767
NSN 6320-00-483-0451
NSN 6145-01-386-3084
NSN 5975-00-899-4606
NSN 5915-01-292-3367
NSN 5835-01-593-7579
NSN 6320-00-731-6134
NSN 5930-01-411-4980
NSN 5905-01-014-4762
NSN 6610-00-958-0294