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 5945-01-099-6889
NSN 5975-00-258-3056
NSN 7035-01-045-7202
NSN 5835-01-152-9483
NSN 6105-00-159-7801
NSN 6645-00-106-0140
NSN 5985-00-005-2503
NSN 7035-01-461-9766
NSN 6645-01-317-6071
NSN 5915-01-423-8561
NSN 6130-00-500-8477
NSN 5945-00-170-5885