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 7035-01-443-3052
NSN 5998-00-390-1502
NSN 5990-01-649-4647
NSN 5920-01-023-6818
NSN 5905-01-487-7241
NSN 5975-01-310-8567
NSN 5950-01-155-0880
NSN 5915-00-655-1804
NSN 5915-00-149-1458
NSN 6650-01-164-5501
NSN 6135-01-487-0773
NSN 6150-00-291-1868