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 6685-00-916-4352
NSN 5905-00-682-4264
NSN 6610-00-757-9060
NSN 5920-01-295-8343
NSN 6135-01-367-6203
NSN 5910-01-630-5072
NSN 4140-01-645-1279
NSN 6110-01-623-4696
NSN 6240-01-446-6171
NSN 5910-00-469-9290
NSN 5985-01-192-3749
NSN 6650-01-565-9448