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 5960-01-284-1642
NSN 5905-01-648-3329
NSN 6320-00-521-9350
NSN 5945-00-192-7187
NSN 4140-00-990-3311
NSN 6650-00-585-1850
NSN 5915-01-367-4614
NSN 5985-01-261-6326
NSN 5960-01-575-7818
NSN 6150-00-763-1203
NSN 6150-01-654-5899
NSN 5960-00-104-5955