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 5950-01-018-2363
NSN 6105-01-078-8286
NSN 5998-01-370-7349
NSN 7035-00-347-5537
NSN 5990-00-239-3432
NSN 5855-00-177-3529
NSN 4140-00-155-8012
NSN 7035-00-232-4043
NSN 6220-00-828-9843
NSN 6240-00-081-6889
NSN 6220-01-077-3461
NSN 6610-01-549-1802