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 6645-01-363-1395
NSN 6620-01-231-9731
NSN 5950-01-193-3276
NSN 5915-01-546-7335
NSN 6130-00-890-0553
NSN 7035-00-631-3782
NSN 7035-00-631-3782
NSN 5895-01-158-5545
NSN 5910-01-222-0769
NSN 5895-00-209-5456
NSN 5945-00-597-5722
NSN 5915-01-448-9399