Better retirement benefits and the return of a performance bonus were also included in the new offer.
But the International Association of Machinists and Aerospace Workers (IAM) asserted that “it was thrown at us without any discussion” and that the offer had not been discussed with the union; Boeing disputes this assertion.
Earlier this month, more than 30,000 Boeing employees went on strike in response to an offer of a 25% salary increase.
“Boeing today presented our best and final offer, after listening to our employees and their concerns,” the massive aircraft manufacturer stated in a letter.
The one-time bonus for signing a new salary agreement would now be worth twice as much, or $6,000 (£4,497).
Boeing stated that the offer is contingent upon union members approving it by Friday, September 27, midnight Pacific Time (7am GMT on Saturday, September 28).
However, IAM said that without informing the union’s representatives, Boeing communicated the revised offer straight to union members and the media.
IAM wrote on X, now known as Twitter, “This tactic is a blatant show of disrespect to you – our members – and the bargaining process.”
In addition, the union said that it would not call a membership vote before Boeing’s deadline.