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 6150-00-035-3344
NSN 6110-00-171-2214
NSN 5925-00-859-7942
NSN 5975-00-430-8082
NSN 5895-01-643-3254
NSN 6610-00-822-0431
NSN 5985-01-197-9918
NSN 6150-01-239-1143
NSN 6105-00-141-5598
NSN 5895-00-900-5449
NSN 5930-01-442-4003
NSN 5925-01-519-3539