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 5895-01-182-9747
NSN 5925-00-027-6353
NSN 5985-01-572-8854
NSN 5935-01-490-9936
NSN 5835-00-463-6699
NSN 6620-01-595-7459
NSN 5905-01-011-6090
NSN 6620-00-993-9564
NSN 6105-01-396-9559
NSN 6105-00-188-1678
NSN 2925-01-311-7840
NSN 6645-01-216-8682