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 5910-01-575-5264
NSN 5996-01-567-6285
NSN 5960-01-207-9544
NSN 5999-00-190-6955
NSN 6650-01-559-3862
NSN 5910-01-444-7828
NSN 5965-00-931-8446
NSN 5910-01-311-9261
NSN 6130-00-198-3241
NSN 5855-01-063-6340
NSN 5945-01-115-8859
NSN 5915-00-900-6391