The United Auto Workers is threatening a strike at Sakthi Automotive Group.
The India-based auto parts supplier has more than 200 employees at two Detroit facilities. It makes safety components for automakers including GM and Ford.
The UAW says Sakthi has engaged in a number of unfair labor practices at its Detroit plants, starting prior to the union organizing workers there in 2015.
Those practices continued as the UAW and Sakthi began collective bargaining in January of this year, says UAW Local 600 Vice President and lead negotiator AJ Freer.