Striking machinists accepted a new contract raising wages by 39 percent, but enduring bitterness will complicate Boeing’s efforts to rebuild its battered corporate culture and flawed production process.

About 33,000 workers at the aerospace manufacturer had been on strike for nearly two months, having rejected two earlier contract offers.

The deal includes pay raises of 38% over four years, and ratification and productivity bonuses. Boeing refused to meet a demand to restore a company pension plan.