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 6110-01-027-1851
NSN 6620-00-286-5721
NSN 5998-00-342-8838
NSN 5999-00-919-3063
NSN 6150-00-177-8328
NSN 5998-01-210-4379
NSN 5835-00-269-2232
NSN 5945-00-314-4554
NSN 5960-00-892-9475
NSN 6220-00-113-3622
NSN 2925-01-069-5324
NSN 6320-01-476-0686