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 6145-01-574-9159
NSN 6145-00-553-8196
NSN 5935-01-518-6259
NSN 5999-01-634-0576
NSN 5965-01-378-0114
NSN 5965-00-314-5303
NSN 5965-00-222-7394
NSN 5855-01-550-5219
NSN 5935-00-550-0885
NSN 6645-01-579-6304
NSN 6320-00-521-9350
NSN 5996-01-462-7339