Uncommon
Flange
A flange is a protruded ridge, lip or rim, either external or internal, that serves: to increase strength, such as the flange of a steel beam such as an I-beam or T-beam for easy attachment or transfer of contact force with another object, such as the flange on the end of a pipe or steam cylinder, or the circular or oval flange for securing truck and trailer tail lights on the lens mount of a camera for stabilizing and guiding the movements of a machine or its parts, such as the inside flange of a rail car or tram wheel which keeps the wheels from running off the rails Flanges are often attached using bolts in the pattern of a bolt circle.
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