We called them suicide knobs in the Midwest as well.I always called it a suicide knob. First saw it on a farm/ranch tractor at a monastery in UT 50 years ago. An uncle was a monk.
Just searched. Has a Wiki page. Lots of names.
Wonder if it's a regional thing. Anyone do the NY Times dialect quiz?
I talk like Yonkers (mom born in the Bronx) and Patterson/Newark, NJ (dad born in Garfield) I talk least like New Orleans, SLC, and Seattle.
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