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 6620-00-186-8220
NSN 5950-00-004-5576
NSN 6320-01-123-6814
NSN 5990-00-067-6791
NSN 5996-01-423-9423
NSN 6610-00-717-3167
NSN 5998-00-838-2383
NSN 5915-01-420-5777
NSN 2925-01-008-1552
NSN 5930-01-545-7057
NSN 6105-01-464-5403
NSN 6645-00-332-2710