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 5835-00-853-7785
NSN 2925-00-782-1498
NSN 6645-01-161-3689
NSN 6145-01-094-1442
NSN 6320-01-392-6922
NSN 5835-01-580-0446
NSN 5996-01-335-0584
NSN 6110-00-425-8787
NSN 6105-00-224-5358
NSN 5895-01-411-6024
NSN 5950-01-324-8642
NSN 6130-01-376-1625