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 6135-01-531-1413
NSN 6145-01-498-4726
NSN 6110-00-919-0325
NSN 6645-01-099-2910
NSN 6130-00-065-9995
NSN 6130-01-168-8001
NSN 5930-00-817-3057
NSN 2925-00-471-1128
NSN 5930-01-062-1560
NSN 6150-00-864-3475
NSN 6135-00-906-0984
NSN 6110-01-407-5706