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 5975-01-470-7464
NSN 5925-00-615-4600
NSN 5990-00-081-5370
NSN 5915-01-298-0442
NSN 5960-01-311-5817
NSN 6145-00-265-6205
NSN 5855-01-020-7982
NSN 5920-00-326-9901
NSN 5895-01-643-5544
NSN 5895-01-056-4548
NSN 6610-01-511-0982
NSN 6685-01-304-2122