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 5975-01-320-4919
NSN 6105-01-125-4161
NSN 6135-01-061-1862
NSN 6320-01-357-3222
NSN 6110-00-391-7000
NSN 6620-00-838-6954
NSN 6645-01-521-3180
NSN 5855-00-482-9876
NSN 5930-00-751-1449
NSN 5915-00-233-5137
NSN 5998-00-522-6112
NSN 5999-01-345-1826