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 5935-01-159-6490
NSN 5998-00-340-9843
NSN 5998-00-319-2833
NSN 6645-00-664-4665
NSN 5855-01-549-3666
NSN 5925-01-216-1975
NSN 5920-01-533-5436
NSN 6320-01-425-1417
NSN 5996-01-472-2112
NSN 6220-00-116-8464
NSN 5985-00-797-3985
NSN 5930-00-311-4358