Slocombe in another illustrating of his shooting prowess.
The visitors also had a penalty shout rejected when Vermijl felt he was tripped inside the box while Macheda rammed a decent opening wide from an angle. Grant snatched at a rare chance although The Iron did look dangerous on the break at times while Petrucci blasted over when a Bebe cross fell into his path just outside the area before handing over the captain's armband to Scott Wootton.
Wootton had to make one saving clearance and Connor Jennings tested Johnstone's reflexes late on as Scunthorpe finished strongly but Lingard almost won it at the death when his shot was cleared off the line and both teams will take plenty from the 1-1 draw.
United: Johnstone; Vermijl (Cole 81), M.Keane, Wootton, Brady; Bebe, Tunnicliffe, Powell, Petrucci (King 85), Lingard; Macheda. Subs not used: Sutherland, Giverin, Veseli, Blackett.