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 5935-00-337-0445
NSN 6650-01-103-7342
NSN 5905-01-316-6681
NSN 5855-01-325-3380
NSN 5996-00-285-3727
NSN 5855-01-258-6180
NSN 5915-00-439-8321
NSN 6320-00-194-4252
NSN 6130-01-447-2797
NSN 5915-01-021-1646
NSN 6110-01-215-2080
NSN 5835-01-242-9806