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 6685-00-826-9381
NSN 5925-00-245-3391
NSN 5905-00-935-6954
NSN 6145-01-476-9375
NSN 6240-01-091-9822
NSN 4140-01-442-3063
NSN 5975-00-427-2866
NSN 5925-00-523-9158
NSN 6645-01-194-6594
NSN 6650-01-513-2644
NSN 5960-00-403-4617
NSN 5950-01-408-4556