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 6685-00-946-1036
NSN 6650-01-107-2733
NSN 6150-00-055-2994
NSN 5975-01-644-2252
NSN 5998-01-456-5613
NSN 6685-01-169-4850
NSN 5930-00-535-2946
NSN 5895-01-426-0688
NSN 2925-01-364-7926
NSN 5985-00-004-5980
NSN 5945-00-922-4796
NSN 6135-01-164-3561