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 5965-00-004-6371
NSN 5930-01-445-9157
NSN 5960-00-578-1920
NSN 5925-00-126-6660
NSN 5975-01-431-8814
NSN 6110-00-054-7278
NSN 5998-00-593-0384
NSN 6150-01-634-0575
NSN 7035-00-200-5162
NSN 6145-01-351-8706
NSN 6610-01-398-8815
NSN 6240-01-006-7279