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 6220-01-356-9188
NSN 6240-01-617-8254
NSN 5905-01-060-6626
NSN 5895-01-167-8477
NSN 5835-00-198-4936
NSN 5920-00-271-3217
NSN 6145-00-862-7069
NSN 7035-00-111-4389
NSN 6130-01-113-5599
NSN 7035-00-205-1932
NSN 6645-01-484-9847
NSN 5935-00-327-4491