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 5855-00-832-9341
NSN 5920-01-150-0758
NSN 5835-00-859-8330
NSN 5910-00-256-2118
NSN 5999-01-473-3043
NSN 5905-00-115-5382
NSN 2925-00-596-9775
NSN 5975-00-541-8531
NSN 6145-01-546-7552
NSN 5915-00-972-5460
NSN 5960-00-465-0566
NSN 5965-00-680-9749