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 6685-00-220-9483
NSN 5835-01-107-8600
NSN 5965-01-489-5508
NSN 5925-00-752-8292
NSN 6130-00-402-0559
NSN 6220-01-158-5956
NSN 5975-01-309-0253
NSN 5895-01-498-3947
NSN 5945-01-032-3575
NSN 5960-00-183-8016
NSN 5996-01-449-0666
NSN 5905-00-202-7797