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 5905-01-338-3468
NSN 6150-01-153-8844
NSN 5975-01-150-3121
NSN 6320-00-456-2092
NSN 5895-01-415-1245
NSN 5960-01-076-4708
NSN 6650-01-089-3292
NSN 6620-01-261-2985
NSN 6135-01-088-4301
NSN 6110-01-069-4895
NSN 5895-01-482-5851
NSN 5910-00-925-2412