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 5905-01-391-4983
NSN 5895-01-306-6950
NSN 6610-01-576-8955
NSN 6220-00-397-6910
NSN 5945-01-199-2764
NSN 6130-01-243-0983
NSN 2925-00-862-8550
NSN 6240-01-392-5991
NSN 5915-01-299-7286
NSN 5975-01-113-7397
NSN 5945-01-348-6074
NSN 6220-01-026-2424