Billericay battled back to hold Leatherhead to a 1-1 draw, forcing an FA Cup first-round replay between the seventh-tier sides.
Jack Midson, a scorer in every round of this season's competition, nodded an opener for Leatherhead but his strike was cancelled out by Billy Bricknell at Fetcham Grove.
The Tanners are in the second round hat for the first time in 11 years, while Billericay, who have spent big this season on the likes of Paul Koncheskey, Jamie O'Hara and Jermaine Pennant, are bidding for their first ever appearance at that stage.
Against the run of play, Midson headed home at the near post in the 21st minute.
He was found by a clipped cross from player-manager Sammy Moore, who was part of the AFC Wimbledon side that gave Liverpool a third-round fright in 2015.
Former Liverpool star Pennant, an FA Cup finalist with Stoke, came off the bench and Town equalised through Bricknell's 68th-minute penalty after Sam Blackman tripped Ricky Modeste.
Leatherhead clung on for a replay, with Zaki Oualah saving well from Rob Swaine's downward header.
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