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 6610-01-438-6896
NSN 5930-01-464-3707
NSN 5910-01-452-1011
NSN 5985-01-264-9758
NSN 6685-01-335-9198
NSN 5965-00-845-1905
NSN 5925-01-458-7666
NSN 5950-01-230-7300
NSN 6610-01-142-3633
NSN 5975-01-414-8873
NSN 6650-01-411-6292
NSN 6150-01-122-5963