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 5996-01-498-2269
NSN 5835-01-067-9271
NSN 5930-01-547-6371
NSN 6105-01-331-8326
NSN 6110-01-360-0363
NSN 6645-00-641-3202
NSN 2925-01-033-8948
NSN 5930-00-096-9678
NSN 6135-00-444-1402
NSN 6135-01-483-1501
NSN 6105-01-391-5285
NSN 5999-01-246-9892