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 7035-01-338-5930
NSN 5950-01-543-4195
NSN 5925-01-634-0664
NSN 6610-01-277-6333
NSN 5945-01-569-3124
NSN 4140-00-500-2718
NSN 5910-01-440-2365
NSN 6685-01-475-7190
NSN 5910-01-157-9946
NSN 5950-00-253-5201
NSN 5945-00-621-8170
NSN 6150-01-577-2732