(Reuters) -Boeing stated on Tuesday that it had withdrawn its pay supply to round 33,000 placing U.S. West Coast manufacturing unit employees and no additional negotiations have been deliberate with their union representatives.

“Unfortunately, the union did not seriously consider our proposals,” Boeing (NYSE:) Business Airplanes head Stephanie Pope stated in a be aware to the workers, calling the union’s calls for “non-negotiable”.

“Further negotiations do not make sense at this point and our offer has been withdrawn.”

The union is looking for a 40% pay rise over 4 years and the restoration of a defined-benefit pension that was taken away within the contract a decade in the past.

Boeing made an improved supply final month that it described as its “best and final”, which might give employees a 30% increase and restore a efficiency bonus, however the union stated a survey of its members discovered that was not sufficient.

The Worldwide Affiliation of Machinists and Aerospace Employees union stated in an announcement that Boeing was “hell-bent on standing on the non-negotiated offer” proposed final month.

“They refused to propose any wage increases, vacation/sick leave accrual, progression, ratification bonus, or the 401k Match/SCRC Contribution. They also would not reinstate the defined benefit pension,” it stated.