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 6135-01-495-0933
NSN 5950-01-246-2598
NSN 5920-00-846-2533
NSN 5920-01-076-4705
NSN 6130-00-771-2100
NSN 5930-00-699-9084
NSN 6685-00-546-5755
NSN 6320-01-365-2701
NSN 5915-01-028-5877
NSN 5835-01-461-8184
NSN 5996-01-354-6483
NSN 5999-00-277-4257