Tempered borisilicate glass
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 6145-00-823-6215
NSN 5998-01-427-8462
NSN 5945-01-081-4710
NSN 5930-01-641-8203
NSN 6110-01-398-6928
NSN 6110-00-570-5904
NSN 5910-00-434-4172
NSN 5915-00-501-4558
NSN 5835-01-143-9143
NSN 5999-01-307-9260
NSN 6240-01-160-4370
NSN 6650-01-279-7136