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 5945-01-112-0327
NSN 5975-01-509-6334
NSN 5895-00-988-4416
NSN 5999-01-222-1728
NSN 4140-01-136-1447
NSN 2925-01-411-8002
NSN 5935-01-406-5077
NSN 6610-01-127-0724
NSN 5930-01-186-6614
NSN 6610-00-021-2259
NSN 6685-01-551-1293
NSN 5985-01-395-8641