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 5965-00-226-0209
NSN 6105-01-020-1353
NSN 6685-00-497-0561
NSN 6145-00-959-5897
NSN 6130-01-152-4161
NSN 2925-00-833-9466
NSN 5985-01-027-0777
NSN 4140-00-770-1052
NSN 6150-00-660-5085
NSN 6320-01-054-3046
NSN 5960-00-256-3622
NSN 5935-01-167-0095