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 6645-00-641-3202
NSN 5910-00-442-6946
NSN 6320-00-360-1744
NSN 5945-00-543-8127
NSN 6105-01-312-3618
NSN 5945-00-312-5945
NSN 6105-01-462-6082
NSN 2925-01-262-1418
NSN 5960-01-367-6153
NSN 5920-01-129-9724
NSN 6620-00-819-5046
NSN 6135-00-196-5267