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 5835-01-137-3723
NSN 4140-01-322-8133
NSN 5999-01-259-9463
NSN 6610-01-398-8092
NSN 6685-01-576-8757
NSN 6685-00-554-3825
NSN 6320-01-515-5346
NSN 6685-01-627-5126
NSN 5975-01-311-7385
NSN 5990-01-106-3786
NSN 5975-01-213-7378
NSN 5855-01-266-1645