Union leaders for more than 3,500 Lockheed Martin employees said Saturday they reached a tentative contract agreement with the company.
In a statement, the union's negotiating committee said it believed the tentative agreement is "fair and equitable."
The existing contract will expire at midnight.
The International Association of Machinists and Aerospace Workers will present details of the contract to its members on Sunday.
The union represents more than 3,500 production and maintenance employees, firefighters and nurses at the Fort Worth facility.