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 5996-00-590-6402
NSN 6110-01-513-9173
NSN 5855-01-536-6134
NSN 5960-01-505-2426
NSN 6135-01-441-0402
NSN 6145-01-642-9785
NSN 6110-01-076-9022
NSN 5990-01-432-4984
NSN 6685-01-100-2653
NSN 6150-00-547-9982
NSN 5915-01-189-4248
NSN 6620-01-461-6427