The University of Michigan and the U-M Skilled Trades Union have reached a tentative agreement on a new contract covering about 500 U-M employees on all three campuses.

The tentative agreement includes wage increases over the four-year contract term. Additional details are pending the outcome of a ratification vote by union members.

The union includes such employees as electricians, plumbers and carpenters.

The current four-year contract expires May 31. Union members will vote on the new agreement in the coming weeks.