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 5985-01-411-6301
NSN 4140-00-818-5734
NSN 6240-01-341-7903
NSN 5999-00-073-5041
NSN 6110-01-195-3631
NSN 5975-00-468-3978
NSN 5835-01-208-8800
NSN 5996-01-094-9754
NSN 6620-01-466-2842
NSN 5975-01-605-8025
NSN 5985-01-096-7222
NSN 5925-00-834-0272