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 5945-01-331-6264
NSN 6620-01-200-6493
NSN 5985-01-044-4523
NSN 6135-01-054-2462
NSN 5960-01-014-3876
NSN 6110-01-345-3314
NSN 6645-01-254-0489
NSN 6610-01-262-3467
NSN 6110-01-004-9870
NSN 5920-01-110-2705
NSN 5999-01-322-8578
NSN 4140-01-094-6836