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 5950-01-140-3794
NSN 5950-00-567-6527
NSN 6110-01-565-3433
NSN 6145-00-294-0830
NSN 6610-01-037-9858
NSN 5910-01-050-0464
NSN 5950-01-530-8052
NSN 2925-01-288-2091
NSN 5998-01-204-9776
NSN 5960-01-539-1956
NSN 5960-00-722-6845
NSN 5950-01-386-3608