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 5960-00-888-7218
NSN 5990-00-583-9920
NSN 6685-00-442-7219
NSN 7035-00-495-2137
NSN 5915-01-123-0778
NSN 5998-01-201-4069
NSN 6320-00-216-8779
NSN 6130-00-100-0175
NSN 6650-01-628-3745
NSN 5905-01-312-6647
NSN 6610-01-141-7014
NSN 5975-01-272-6182