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 6685-01-535-4250
NSN 6145-01-442-0621
NSN 5998-00-858-1613
NSN 6130-01-613-7688
NSN 4140-00-161-0038
NSN 6135-01-495-0933
NSN 5905-01-485-3996
NSN 5965-01-210-7784
NSN 6620-00-882-6972
NSN 6220-00-244-2040
NSN 6135-00-284-1406
NSN 5985-01-376-0307