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 6320-00-004-9158
NSN 6685-01-418-0925
NSN 6610-01-262-3467
NSN 2925-01-612-0405
NSN 6240-01-080-4346
NSN 5985-01-268-1804
NSN 6645-01-152-5207
NSN 5996-01-358-4045
NSN 5905-01-399-8656
NSN 6320-00-937-5625
NSN 6685-01-531-8945
NSN 5999-01-440-7645