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 5910-00-808-2241
NSN 6150-01-106-3646
NSN 5855-00-466-2309
NSN 5855-01-203-4719
NSN 5975-01-231-1966
NSN 5930-01-338-0722
NSN 5950-01-157-4133
NSN 5920-01-168-7810
NSN 6135-00-299-6918
NSN 2925-00-275-1807
NSN 5935-00-555-1897
NSN 6135-00-209-6918