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 6135-00-660-8654
NSN 5835-01-170-5537
NSN 5895-01-273-5107
NSN 6645-00-100-7218
NSN 5999-01-450-0758
NSN 6105-00-351-8009
NSN 5945-01-501-0731
NSN 6220-00-155-8007
NSN 5905-00-661-2395
NSN 5905-01-421-4421
NSN 5965-00-455-7581
NSN 6620-01-476-4567