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 6145-01-620-9865
NSN 6620-01-210-9002
NSN 5950-01-306-7931
NSN 5895-00-870-0088
NSN 5965-01-592-3051
NSN 6220-00-171-8638
NSN 5920-01-389-9582
NSN 6110-00-150-7844
NSN 6220-01-235-5843
NSN 6645-00-704-3630
NSN 5996-01-500-6644
NSN 6145-01-591-3436