The US had two: the USS Thresher (SS-200) and the USS Thresher (SSN-593).

The two US submarines lost after their hulls were crushed were the USS Thresher and the USS Scorpion. They are SSN-593 and SSN-589, respectively.

USS Thresher (SSN-593) was the lead boat of her class of nuclear-powered attack submarines in the United States Navy. More information about it one can find on 'USS Thresher'-Wikipedia page. One can also watch 'National Geographic: Major Submarine Disaster'.

USS Thresher (SSN-593), lead ship of her class, was lost on April 10, 1963, during post-shipyard sea trials. The loss of the Thresher (believed to be the result of a chain of events beginning with a pipe joint failure and frozen air lines) led to the SUBSAFE Quality Assurance program, as well as re-engineering of critical systems and emergency procedure changes.