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 5960-01-425-1454
NSN 5930-00-504-0151
NSN 5965-01-273-0943
NSN 6610-00-007-5246
NSN 7035-01-271-1643
NSN 5915-01-289-2752
NSN 5855-00-174-3482
NSN 2925-01-600-2309
NSN 5975-01-423-6812
NSN 6135-00-985-7846
NSN 6645-00-767-6307
NSN 6105-01-556-4228