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 6135-01-368-2785
NSN 5835-00-888-9422
NSN 5905-01-443-1911
NSN 6150-01-086-4198
NSN 5950-01-537-0562
NSN 6135-01-238-2878
NSN 5925-01-458-7666
NSN 6610-00-466-3104
NSN 5925-00-351-6296
NSN 6110-00-494-9135
NSN 5910-01-233-0493
NSN 6150-01-525-5897