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 2925-01-292-9248
NSN 5935-01-345-4231
NSN 5945-00-762-8215
NSN 6130-01-275-1738
NSN 6610-00-680-8325
NSN 5915-01-360-1325
NSN 6685-01-132-4637
NSN 5960-00-913-6195
NSN 2925-00-678-5502
NSN 6620-00-739-4874
NSN 2925-01-280-1911
NSN 6620-01-440-9810