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 5905-00-060-7974
NSN 5996-01-081-8002
NSN 6110-01-596-1501
NSN 5945-01-522-0008
NSN 5920-00-752-3081
NSN 5990-00-165-9195
NSN 5910-01-385-3273
NSN 5925-01-420-6924
NSN 6105-00-318-2807
NSN 6110-00-778-3558
NSN 6135-01-499-3516
NSN 6685-01-361-7594