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 4140-00-473-8189
NSN 6105-01-191-2015
NSN 6240-01-552-0015
NSN 6105-00-969-2501
NSN 6135-01-039-2882
NSN 7035-01-605-3375
NSN 6145-00-833-7753
NSN 5925-00-767-0284
NSN 5925-01-308-0669
NSN 5915-00-826-8731
NSN 6320-01-498-4954
NSN 5930-01-472-0889