Here are key provisions of the agreement:

-777X final assembly line and wing fabrication and assembly will be located in the Puget Sound area.

-Workers' defined-benefit retirement plan stops accruing in 2016. Existing pension accruals are still paid.

-Workers receive a percentage of their gross earnings from Boeing in a new retirement-savings account. Contributions are 10 percent in 2016 and 2017, 6 percent in 2018 and 4 percent afterward. New hires receive 4 percent each year.

-Workers receive a higher company match in their existing retirement-savings plan. Match increases to 75 percent of first 8 percent contributed from 50 percent match currently.

-Workers receive 1 percent pay increases in 2016, 2018, 2020, and 2023.

-The current six-step pay scale is extended through 2024. An earlier offer sought to require more years for workers to reach top pay levels.

-737 MAX jetliner production will stay in Renton, Washington, through 2024.

-31,000 machinists receive a $10,000 bonus for ratifying the agreement and another $5,000 lump sum payment in 2020.

-Workers pay increased health care premiums. For a family on a traditional medical plan, for example, the monthly payment rises to $233 by 2024 from $66 currently.

(Reporting by Alwyn Scott; Edited by Martin Howell and Dan Grebler)

By Alwyn Scott