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 5945-01-393-6477
NSN 5945-00-100-1261
NSN 5996-01-079-7914
NSN 6620-01-539-2729
NSN 5990-01-255-7387
NSN 5950-00-983-8678
NSN 5915-00-175-8657
NSN 5945-01-116-7041
NSN 5905-01-583-9617
NSN 6105-01-379-8624
NSN 6685-01-496-1064
NSN 2925-01-448-2880