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 6220-01-119-6711
NSN 5930-01-439-6359
NSN 5996-00-011-3851
NSN 5960-00-349-7650
NSN 6645-01-392-9615
NSN 6320-01-415-0953
NSN 5945-00-908-7553
NSN 5990-01-347-1478
NSN 5925-01-469-0694
NSN 5925-00-290-4451
NSN 6145-01-471-7901
NSN 5905-01-025-6649