All three new signings - Andy Crosby, Ian Baraclough and Paul Musselwhite - were named in the starting lineup.
It was Baraclough who created United's goal, with Steve Torpey forcing his pass into the path of Hayes who stuck the ball into the bottom corner.
The home side equalised two minutes before the break from the penalty spot afer a handball decision Laws described as `harsh`.
A young French striker had been expected to link up with Scunthorpe during the Dutch training camp, but has failed to turn up and United have now dropped their interest in him.