SEATTLE -- Thousands of Boeing workers marched, chanted and waved signs during their lunch break at Boeing's Everett plant Friday, as union and company negotiators tried to reach a labor agreement before midnight. Watch raw video

Members of the Boeing Machinists union are poised to strike early Saturday unless talks in Florida result in an agreement before a 48-hour contract extension expires.

The contract affects 25,000 aircraft workers in the Puget Sound area and about 2,000 more in Wichita and Portland.

Workers voted this week to reject Boeing's offer and go on strike, mainly over job security. Union leaders agreed to the extension at the request of Gov. Chris Gregoire.

Seattle papers reported that negotiators went to Florida to meet with a top union official who is attending a conference in Lake Buena Vista.

Many workers told KIRO 7 Eyewitness News they are ready to walk.

"I voted to strike. I voted against the contract, and so did 87 percent of the people," said Dale Flinn. "And I don't think it's right that we should have to go in there and work another day or two, not another minute."

A half-dozen workers carried strike signs Friday outside Boeing's factory in Everett. They said some unhappy workers have slowed their work.

There is no word on any progress in the talks.