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 6150-01-622-2586
NSN 5935-01-429-1011
NSN 5895-01-596-4735
NSN 5996-00-223-9003
NSN 7035-00-329-4015
NSN 6620-01-061-3497
NSN 5835-01-126-9358
NSN 5905-01-629-9849
NSN 5950-01-196-5178
NSN 6685-01-203-7372
NSN 6650-01-622-6645
NSN 5990-00-804-4982