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 7035-00-870-0290
NSN 6105-01-360-6793
NSN 6610-00-136-2662
NSN 6650-01-278-5569
NSN 6320-01-141-3791
NSN 5996-01-276-8835
NSN 6105-01-006-4338
NSN 2925-00-146-0179
NSN 6145-00-978-8056
NSN 6130-01-101-9026
NSN 5925-01-525-7694
NSN 5905-01-531-3941