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 6105-01-571-7371
NSN 2925-01-327-3069
NSN 6610-00-949-9792
NSN 5950-01-331-2840
NSN 5965-01-386-2988
NSN 5965-01-366-5900
NSN 5990-01-057-4191
NSN 5985-00-020-7033
NSN 6320-01-578-6006
NSN 6240-01-645-4797
NSN 5925-01-433-2535
NSN 6130-01-047-8603