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 5835-01-341-1757
NSN 5855-00-688-9954
NSN 2925-01-203-0493
NSN 6130-01-384-4391
NSN 5975-01-383-8638
NSN 5996-00-519-5150
NSN 6150-00-307-2652
NSN 5960-00-099-9790
NSN 6620-00-816-9755
NSN 5855-01-495-1038
NSN 5975-01-304-0549
NSN 6220-01-448-8868