More than 100 workers in Towson near Baltimore “have overwhelmingly voted to join the International Association of Machinists and Aerospace Workers,” the union said on its website.
“This is something we do not to go against or create conflict with our management,” they wrote.
Unionization efforts are gaining momentum at some large U.S. corporations, including Amazon.com Inc and Starbucks Corp.
Apple workers in Atlanta who were seeking to unionize withdrew their request last month, claiming intimidation.
(Reporting by Jaiveer Singh Shekhawat in Bengaluru; Editing by William Mallard)