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 5930-01-370-2460
NSN 7035-00-312-3055
NSN 6130-00-377-0655
NSN 5945-01-559-9967
NSN 5950-00-864-5029
NSN 6610-00-398-0104
NSN 6145-01-020-8428
NSN 5999-01-435-4381
NSN 5905-01-028-9161
NSN 5950-01-464-2507
NSN 5996-00-944-2485
NSN 6150-01-274-6349