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 6610-00-325-0485
NSN 5915-00-628-2476
NSN 5905-01-492-2947
NSN 5910-01-614-7064
NSN 5999-01-026-1140
NSN 6135-00-542-6216
NSN 6145-01-289-5492
NSN 5996-00-565-6136
NSN 2925-01-131-8761
NSN 5975-01-166-5656
NSN 6320-01-622-5493
NSN 5895-01-041-5313