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 6620-01-020-4526
NSN 6220-01-644-4742
NSN 5985-01-560-1889
NSN 6105-01-328-0943
NSN 6645-01-395-2989
NSN 6645-01-200-3577
NSN 6105-00-873-0244
NSN 5975-01-519-2519
NSN 6610-00-514-7773
NSN 5935-01-044-4888
NSN 5985-01-142-2710
NSN 6145-01-451-4599