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 5960-01-505-2426
NSN 5855-01-295-2313
NSN 5975-01-313-5055
NSN 6650-00-283-0978
NSN 6610-01-620-2303
NSN 5905-00-915-8843
NSN 6320-01-466-4175
NSN 5930-01-194-8586
NSN 5920-00-803-3290
NSN 6145-01-406-4201
NSN 5999-01-601-2064
NSN 5910-00-287-3258