Henderson's free-kick flicked wide off the wall and Powell should have earned a penalty after being flattened inside the box by Sead Hajrovic. There was a scare at the other end when Amos clattered into Akpom as he chased his hat-trick with the keeper picking up a yellow card for catching the striker with his elbow.
Tunnicliffe was off target with an ambitious raking drive as United searched for a winner while Januzaj, Lingard and Powell continued to look bright going forward. However, the Gunners proved they were just as capable of scoring again when danger-man Akpom headed over the top from close range under pressure from McGinty.
Januzaj switched to the right flank and, looking at home at this level now, was unfortunate to see a drive deflect and loop behind the goal before the Belgian played McGinty in down the left and the left-back's attempted cross drifted dangerously onto the top of the net.
Lingard chipped a shot to Fabianski and Amos watched a Gnabry free-kick fly wide as the match remained all-square, which was probably a fair result in conclusion.
United: Amos; Veseli (McGinty 36), Fornasier, Brown, Vermijl; Januzaj, Thorpe, Tunnicliffe, Cole, Lingard; Powell. Subs not used: Sutherland, Blackett, Lawrence, Ekangamene.