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 5835-00-327-6192
NSN 6320-01-292-6635
NSN 6610-00-782-0382
NSN 6145-01-460-0598
NSN 6645-01-314-7020
NSN 5905-01-539-4253
NSN 6650-00-161-4122
NSN 5985-01-537-7343
NSN 6645-01-460-4339
NSN 6620-00-342-9843
NSN 7035-01-450-5330
NSN 6220-01-495-2183