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 6130-00-324-8416
NSN 5925-00-919-3054
NSN 5930-00-216-1996
NSN 7035-01-299-7935
NSN 5905-01-119-4259
NSN 5945-01-097-8656
NSN 5930-01-522-6362
NSN 6610-01-117-5000
NSN 5975-01-215-1205
NSN 5985-01-430-2923
NSN 6135-01-231-4809
NSN 5855-01-116-8905