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 6240-01-106-2447
NSN 5950-01-119-8010
NSN 7035-01-085-5955
NSN 5855-01-474-6444
NSN 6650-01-579-3855
NSN 5935-01-603-8861
NSN 5905-00-681-2643
NSN 5950-00-346-3608
NSN 5998-01-004-3391
NSN 6610-00-552-6332
NSN 6620-01-067-8336
NSN 5990-01-108-7785