75 Years ago today, the Senate voted unanimously, after holding zero hearing to confirm President Truman's first SCOTUS nominee, Justice Harold Burton, one day after his nomination to replace retired Justice Owen Roberts.
"President Harry S. Truman got the chance to make his first Supreme Court appointment when Justice Owen Roberts resigned at the close of the court's term in July 1945. On Sept. 18, 1945, Truman submitted Burton's name to the Senate, which confirmed him unanimously the next day without holding hearings and ended up serving 13 full terms on the court."
https://www.supremecourt.ohio.gov/MJC/places/hhBurton.asp