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 6645-01-076-9310
NSN 6620-01-439-8035
NSN 5960-00-262-7186
NSN 7035-01-357-1251
NSN 5935-01-341-2081
NSN 6130-00-202-4688
NSN 5905-01-509-9676
NSN 5835-00-794-7500
NSN 5925-00-448-2543
NSN 6650-00-074-2445
NSN 4140-01-467-5166
NSN 6145-00-700-7910