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 5935-00-229-4737
NSN 5895-01-576-9546
NSN 5910-01-238-3415
NSN 6610-00-451-8840
NSN 5915-01-042-7447
NSN 5998-00-690-9973
NSN 4140-00-247-4773
NSN 5925-01-451-3584
NSN 5915-01-465-3184
NSN 6150-01-631-3166
NSN 6645-01-477-9292
NSN 6145-01-336-4786