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 6105-00-347-6917
NSN 6610-00-288-5655
NSN 6110-00-477-8372
NSN 5945-01-262-3501
NSN 6645-01-147-5579
NSN 7035-01-210-0493
NSN 5835-01-012-1436
NSN 7035-00-679-9027
NSN 6220-00-379-4044
NSN 5920-00-013-9967
NSN 6110-01-441-6302
NSN 5855-00-472-2055