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 5895-01-620-7777
NSN 5935-01-274-9644
NSN 6135-01-609-0843
NSN 5985-01-017-0280
NSN 5930-00-956-5110
NSN 5935-01-312-2821
NSN 5965-01-605-4703
NSN 5990-00-723-2482
NSN 5990-01-304-7597
NSN 5915-01-271-3933
NSN 5930-00-006-7292
NSN 5950-01-277-5377