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 6220-01-262-7302
NSN 5925-00-167-5475
NSN 7035-01-067-8775
NSN 6150-01-393-7360
NSN 6620-01-142-8277
NSN 6110-01-276-7141
NSN 5855-00-294-7532
NSN 6620-00-068-2503
NSN 6320-01-512-2031
NSN 7035-01-364-8454
NSN 5930-01-502-6910
NSN 6145-01-616-9653