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 5960-01-548-4896
NSN 6610-01-111-6418
NSN 5999-01-579-6774
NSN 5910-01-372-8993
NSN 6650-01-474-3754
NSN 6130-01-366-7481
NSN 5920-01-146-4325
NSN 6620-01-527-0664
NSN 4140-01-581-4344
NSN 5930-00-682-7785
NSN 5950-01-249-4645
NSN 2925-00-233-5644