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 5965-01-322-8136
NSN 5950-01-470-6607
NSN 6650-01-148-7911
NSN 6610-00-202-5481
NSN 5996-00-367-2388
NSN 2925-01-159-8312
NSN 6150-01-535-6181
NSN 7035-00-968-4848
NSN 4140-01-105-7586
NSN 6645-01-032-5337
NSN 5920-00-753-5113
NSN 6110-00-069-2942