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 2925-01-384-4139
NSN 5895-00-462-9157
NSN 5965-00-822-8549
NSN 5965-00-577-1242
NSN 7035-00-679-9027
NSN 4140-01-515-2722
NSN 6240-01-195-8696
NSN 6220-00-172-3737
NSN 6105-00-082-0333
NSN 5935-00-233-6477
NSN 6645-01-633-1852
NSN 5960-00-118-8098