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 6135-01-485-4512
NSN 6240-01-182-3002
NSN 5975-00-468-9924
NSN 5990-01-253-1332
NSN 5965-01-215-0993
NSN 5960-01-065-9684
NSN 5930-00-170-7146
NSN 5915-00-958-2622
NSN 5945-01-025-1163
NSN 6105-01-278-1375
NSN 5950-01-317-2314
NSN 5910-01-651-0928