A transparent item of a predetermined size that permits unobstructed and undistorted view of a desired area. It may include a frame, have reference markings, grid lines and may be heat strengthened and/or tinted. It is generally used where safety, security, and/or the restriction of foreign matter are required, such as the visual examination of the inside of pressurized tanks, liquid sights, controlled liquid flow, and inspection of equipment enclosed in a housing. See window (as modified); scale, cathode ray tube; scale, plotting; window, metal; window, wood; and window panel, aircraft.
Classification: Pressed or molded glass articles, wired or not, for building or construction;leaded glass windows etc; formed multicellular or foam glass
NSN 6110-00-019-1385
NSN 6240-01-034-0436
NSN 7035-01-435-7962
NSN 6135-00-477-8847
NSN 6610-01-627-8985
NSN 6240-00-383-2573
NSN 5965-01-085-6158
NSN 5990-00-078-8529
NSN 6110-01-226-6983
NSN 5990-00-876-7893
NSN 6610-01-648-6527
NSN 6620-01-451-3742