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 6320-01-476-7702
NSN 6685-01-086-7268
NSN 5855-00-832-9341
NSN 5990-00-554-0366
NSN 5950-00-481-8405
NSN 5998-00-835-1300
NSN 5945-00-522-1845
NSN 5935-00-606-0863
NSN 5905-01-416-4440
NSN 5950-01-232-4730
NSN 5975-01-297-0497
NSN 5930-00-554-1064