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 5960-00-724-5787
NSN 5930-00-615-9027
NSN 5998-01-030-4806
NSN 5855-00-110-9341
NSN 5945-00-598-6130
NSN 5910-01-003-8582
NSN 6645-01-025-1002
NSN 5975-01-098-6047
NSN 6685-01-217-8420
NSN 6685-00-563-7475
NSN 6685-01-343-5523
NSN 6685-00-684-7891