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 2925-01-144-7106
NSN 6135-01-507-1135
NSN 5910-00-723-0985
NSN 7035-00-167-7411
NSN 5835-01-416-6455
NSN 5965-01-449-2794
NSN 6685-01-504-7777
NSN 5999-01-539-6896
NSN 5935-01-284-1802
NSN 6135-01-150-6916
NSN 5998-01-305-8955
NSN 6135-01-132-6310