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 6110-00-613-1430
NSN 5895-01-548-1122
NSN 5985-00-019-2704
NSN 6645-00-079-1430
NSN 5998-01-034-7786
NSN 5930-00-133-8729
NSN 6650-00-702-3560
NSN 6105-01-371-3045
NSN 5975-00-719-9793
NSN 5935-00-580-1724
NSN 6135-00-927-5848
NSN 6685-01-510-4558