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 5965-00-181-0213
NSN 2925-00-707-6770
NSN 6145-01-490-6991
NSN 6650-01-214-9728
NSN 5925-00-885-9497
NSN 5920-01-514-0175
NSN 6135-00-248-4102
NSN 6645-01-280-5395
NSN 5910-00-884-5267
NSN 2925-01-252-8049
NSN 6650-01-065-4748
NSN 6610-00-835-0248