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 5950-01-653-1264
NSN 6650-00-597-7313
NSN 6130-00-781-4245
NSN 5895-01-593-1903
NSN 5905-00-158-7994
NSN 5910-00-015-3887
NSN 5905-01-600-0179
NSN 6645-01-015-3684
NSN 5925-01-378-6857
NSN 6150-00-000-0180
NSN 5960-00-088-4341
NSN 5920-00-391-6252