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 5945-01-090-8767
NSN 5905-00-072-5994
NSN 6145-00-009-9324
NSN 5945-01-429-0094
NSN 5925-01-608-5034
NSN 5915-01-202-8195
NSN 5920-01-291-1330
NSN 4140-01-512-6230
NSN 5910-01-600-0199
NSN 6110-01-277-0602
NSN 5960-01-515-4791
NSN 4140-01-102-7798