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 5945-00-906-3532
NSN 5985-00-389-9237
NSN 6645-01-128-6932
NSN 6105-01-561-9928
NSN 6320-00-546-9249
NSN 6610-01-547-7349
NSN 5925-00-165-0371
NSN 6105-00-339-4222
NSN 5920-01-169-4560
NSN 5910-01-611-5753
NSN 6130-01-354-9306
NSN 6685-01-300-9973