Fenway and MGM concessions workers will go on strike if a contract deal is not reached by Friday, the UNITE HERE Local 26 union workers announced Wednesday.

“We are here today to announce a 48-hour deadline to get this contract settled,” said Local 26 President Carlos Aramayo. “Aramark and Fenway Park have 48 hours to get this done. If this is not done by noon on Friday, we are walking the workers at Fenway Park and MGM off the job.”

The Local 26 union, representing cashiers, cooks, barbacks, souvenir vendors, utility workers and more at MGM Music Hall and Fenway park, voted by 95% to authorize a strike in June. If a deal is not met by Friday, the strike would mark the first-ever in park’s 113-year history.

The strike would hit the park as the Red Sox are set to play the Dodgers in a three-game series over the weekend. Organizers said the strike would last through the series, and the union would discuss then whether to continue.

Local 26 workers said they have been in negotiations with the company Aramack and Fenway Park for six months. The union said they’re seeking significant pay raises, job security amid the rise of automation and more.

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As of Wednesday, Aramayo said, the two parties are apart by “dollars not cents,” adding the gap is “really, really significant.”

“None of us want to walk out, but we all want good wages, and we all want to preserve the jobs that we have had,” said Amanda Savage, a stand worker at Fenway Park. “So whatever that takes is whatever it takes.”

— Developing

Aramark employees and members of UNITE HERE Local 26 at Fenway Park and MGM Music Hall, including Steven Smith, assemble picket signs on Ipswich Street in Boston, around the corner from Fenway Park Wednesday, in anticipation of a potential strike that will happen at noon on Friday. (Mark Stockwell/Boston Herald)