Sixty-four percent of those who voted cast a ballot to reject the proposed deal, which Boeing had hoped would be enough to end a nearly six-week walkout.

Thousands of Boeing aircraft machinists have rejected a contract offer for the second time in less than two months, meaning a strike that has halted airplane production at the company’s factories around the Puget Sound region for nearly six weeks will go on.

The union representing 33,000 striking Boeing machinists’ on the US West Coast turned down the latest contract offer and decided to continue the strike.