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 5945-01-295-9094
NSN 6145-01-022-2097
NSN 5905-00-157-5708
NSN 6685-00-971-2570
NSN 5915-01-064-7003
NSN 6130-01-418-1606
NSN 5996-00-534-6049
NSN 6610-01-074-9798
NSN 6130-00-815-3516
NSN 5855-00-532-0025
NSN 7035-00-421-8710
NSN 5855-00-548-4742