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 5835-01-367-4330
NSN 6320-01-495-1244
NSN 5895-01-349-3481
NSN 2925-00-739-5090
NSN 5915-01-230-5350
NSN 5920-01-474-3593
NSN 6320-01-418-2611
NSN 5925-01-299-5450
NSN 5925-01-437-7528
NSN 6150-01-605-2711
NSN 6645-00-218-6354
NSN 6685-01-279-0647