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 6320-01-495-1244
NSN 5835-00-013-9271
NSN 5996-01-207-2724
NSN 6220-00-825-2783
NSN 5999-01-440-9537
NSN 5950-01-608-4489
NSN 5990-00-318-2592
NSN 6130-00-882-9330
NSN 5895-00-054-4759
NSN 6645-00-854-2279
NSN 5990-00-875-4628
NSN 5915-01-343-0941