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 6135-01-026-9960
NSN 5945-01-390-5679
NSN 6130-01-431-3497
NSN 6320-01-067-0474
NSN 5945-01-206-4520
NSN 4140-01-111-1117
NSN 5950-00-803-2295
NSN 5950-00-237-5362
NSN 6610-01-498-0524
NSN 6320-00-459-8973
NSN 5925-01-564-8177
NSN 5950-00-631-2638