Brian Quailey held his nerve from the spot to earn Nuneaton a second crack of the whip in the FA Cup as they drew 2-2 with Histon.
Quailey netted early in the second half to level the scores after two goals in eight first-half minutes put Conference South side Histon in charge.
The visitors went into the game without a defeat in four but they fell behind after 35 minutes when Matty Collins headed David Staff's left-wing cross into the bottom corner from penalty-spot range.
Histon levelled within a minute, Jamie Barker heading Erkan Okay's right-wing cross past Darren Acton from inside the six-yard box.
And the Stutes went in front a minute before the break when Nathaniel Knight-Percival fired home from 20 yards after Michael Love failed to clear his lines for the hosts.
Quailey fired home from the spot after 54 minutes to level the scores after a handball on the line.
Boro thought they had won it with 10 minutes to go when Terry Angus headed home, only to see his effort ruled out for pushing.