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 5905-01-203-4754
NSN 5945-01-102-7707
NSN 5835-01-310-3846
NSN 6220-01-301-1349
NSN 5835-00-080-8213
NSN 5945-01-341-4763
NSN 5960-01-518-4440
NSN 6135-01-222-0703
NSN 4140-00-172-1804
NSN 6130-01-084-1002
NSN 5945-01-377-5424
NSN 6130-00-433-4873