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 6105-00-671-1785
NSN 5965-00-775-6496
NSN 6645-01-342-1917
NSN 6610-00-174-6709
NSN 6645-01-440-0755
NSN 6240-01-406-5345
NSN 5975-00-168-3492
NSN 5895-01-006-4613
NSN 5985-01-125-1393
NSN 5985-00-073-0628
NSN 5998-01-634-0604
NSN 6610-01-395-4292