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 6220-00-899-6718
NSN 5999-01-406-5216
NSN 6130-00-596-9565
NSN 6320-00-500-4172
NSN 6620-00-837-9484
NSN 5999-01-020-7271
NSN 5996-00-361-9901
NSN 6645-00-930-3566
NSN 5945-00-189-8783
NSN 6610-01-223-9655
NSN 6240-00-383-7668
NSN 5990-00-842-6736