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 5855-01-657-7657
NSN 7035-00-365-3989
NSN 6240-01-592-0615
NSN 5965-01-128-1410
NSN 2925-01-531-3872
NSN 6130-01-075-2159
NSN 5855-01-475-9446
NSN 5945-00-809-4615
NSN 5935-00-810-2519
NSN 6620-01-266-1663
NSN 5945-01-577-7114
NSN 6610-00-729-6479