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 6685-01-649-7127
NSN 5925-01-313-0205
NSN 6320-01-170-4068
NSN 6130-01-334-9320
NSN 5935-00-842-0265
NSN 6610-01-454-8386
NSN 6110-01-213-7469
NSN 6135-01-066-6904
NSN 5965-01-115-9464
NSN 6620-00-221-6639
NSN 6240-00-624-8440
NSN 5996-01-138-5073