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 6135-00-087-5300
NSN 5999-00-611-0574
NSN 5996-01-534-6088
NSN 6240-00-185-8367
NSN 5996-00-330-9184
NSN 6610-01-478-7509
NSN 4140-00-254-7257
NSN 5975-01-621-9764
NSN 5999-01-454-1038
NSN 5965-01-233-8607
NSN 6620-01-173-3284
NSN 5910-01-546-4449