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 5998-00-627-4507
NSN 5925-00-792-9073
NSN 5910-01-410-2850
NSN 5925-00-990-0238
NSN 5935-01-542-5684
NSN 4140-01-470-8518
NSN 5910-00-444-2221
NSN 5960-01-614-8005
NSN 5985-01-141-7022
NSN 5935-01-532-9567
NSN 5950-01-038-9709
NSN 6320-01-320-3305