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 5990-01-116-2181
NSN 6320-00-036-3688
NSN 5990-01-529-7307
NSN 6145-01-307-7804
NSN 5996-01-386-4230
NSN 5835-01-442-6482
NSN 5835-01-397-8801
NSN 6135-01-265-1384
NSN 6220-01-441-2249
NSN 6240-00-926-4462
NSN 5945-01-355-4230
NSN 5950-00-246-5277