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 7035-01-573-8984
NSN 6135-01-113-1507
NSN 5920-01-523-9442
NSN 5945-01-071-7647
NSN 5925-01-484-5087
NSN 5985-00-932-5333
NSN 6685-01-180-7697
NSN 5965-00-959-8162
NSN 6145-00-596-8447
NSN 5915-00-244-7328
NSN 5915-01-408-5947
NSN 5905-01-065-1663