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 5905-01-271-4188
NSN 5895-00-936-8392
NSN 6650-00-161-4122
NSN 4140-00-862-2843
NSN 5990-01-317-4427
NSN 5950-00-142-9078
NSN 6645-01-431-0732
NSN 6130-01-469-6139
NSN 6685-00-258-2257
NSN 6220-01-240-5573
NSN 5910-00-321-8374
NSN 5965-00-404-3317