Stress relief annealed
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 5999-01-421-8284
NSN 5855-00-281-3843
NSN 5920-01-469-3058
NSN 5990-01-054-4255
NSN 5905-01-445-5923
NSN 5930-01-025-9475
NSN 7035-00-763-6180
NSN 5855-01-549-9570
NSN 5945-01-431-8124
NSN 6320-01-064-0372
NSN 6610-00-137-3959
NSN 4140-00-489-3020