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 6620-01-054-9346
NSN 5985-01-431-8111
NSN 5945-01-246-5466
NSN 6145-01-524-0558
NSN 5905-00-184-8377
NSN 2925-00-656-3224
NSN 6105-01-574-2906
NSN 5990-01-510-1430
NSN 5910-01-566-3296
NSN 5960-00-803-2977
NSN 5965-01-446-1939
NSN 5996-01-212-9866