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American made planes.
“The propeller is almost identical with our Hamilton-Standard 3E50-297 series,” noted the prop section. “The blades are made of aluminum alloy, and seem to be a perfect copy of ours. The internal parts of the propeller have regular part numbers as listed in our 03-A parts catalogue. The propeller is of about 1937 vintage, as the improvements noted were being used at that time.”
https://www.historynet.com/hiranos-pearl-harbor-zero/
https://www.militarytimes.com/veterans/military-history/2024/12/07/how-recovering-a-japanese-zero-at-pearl-harbor-added-to-its-mystery/