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 7035-01-541-5414
NSN 6685-01-215-8125
NSN 5855-00-451-6155
NSN 5960-01-113-4839
NSN 5905-01-220-7417
NSN 6240-00-488-0278
NSN 6110-01-183-6656
NSN 6320-01-498-4954
NSN 5905-00-290-8098
NSN 6240-01-246-1896
NSN 6145-00-265-6205
NSN 5998-00-090-7303