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 5960-01-023-8800
NSN 5895-01-534-9914
NSN 5975-00-753-6864
NSN 6645-00-654-8804
NSN 5945-01-403-2800
NSN 6240-01-120-7594
NSN 6220-00-391-1076
NSN 5930-01-267-7869
NSN 5950-00-267-8060
NSN 6620-01-462-0001
NSN 7035-01-417-6261
NSN 5855-00-361-0167