1992: United 2 Southampton 2
It only prolonged the agony but Brian McClair's 90th minute equaliser forced extra time against the Saints after Alex Ferguson's side found themselves 2-0 down inside 21 minutes. Andrei Kanchelskis had given the hosts hope but Tim Flowers emerged as the hero in the penalty shoot-out as the visitors won 4-2 on spot-kicks.
1990: Crystal Palace 3 United 3 (Wembley)
With seven minutes left, the chances of the boss picking up his first trophy at the club were vanishing fast. Hughes kept his composure to roll his second goal of the match past Nigel Martyn and Lee Martin's strike won the replay and the rest, as they say, is history.
1972: United 1 Stoke 1
Jimmy Greenhoff, later to become an Old Trafford favourite, looked to have sent the Potters through but George Best equalised with five minutes left. Although Best scored again in the replay, Stoke came from behind following extra time to clinch a place in the semi-finals.
1965: United 2 Burnley 1
The Reds were trailing to Andy Lochhead's effort at Old Trafford until a quickfire double inside the space of a couple of minutes. Denis Law's overhead kick and a Paddy Crerand howitzer did the damage to turn the tie on its head and set up a classic sixth-round encounter at Wolves.
1964: United 3 Sunderland 3
A stirring FA Cup clash was heading the Second Division leaders' way following a second-half double by Johnny Crossan. After keeper Jim Montgomery complained of concussion when blocking a Law shot, United took full advantage with two goals inside the last four minutes from Bobby Charlton and Best and Law almost won it.
1964: Sunderland 2 United 2
A match that became the stuff of legend in the North East with some reckoning it was watched by a record Roker Park crowd despite the official