Stockport equalled a Football League record of eight wins with eight clean sheets by toppling Walsall from the top of League Two.
Striker Anthony Elding's second-half volley boosted County's chances of automatic promotion as the Saddlers suffered a third successive defeat.
Elding converted a brilliant right-wing cross by man of the match Tes Bramble after a disappointing and sterile opening 45 minutes.
County's latest victory equalled a club record dating back to 1927 while on-loan keeper Wayne Hennessey emulated Harry Hardy's achievement of eight successive shut-outs.
Hennessey had little to do because the defenders in front of him snuffed out Walsall's fleeting moment of success in attack.
Ashley Williams was superb in the middle of the back four while skipper Gareth Owen was rarely ruffled by a visiting side that has collected only one point from the last 12.
County hit the front after 51 minutes. Bramble raided down the Walsall left and whipped in a brilliant centre with pace that Elding met on the volley from eight yards to register his fifth goal in seven games.
Bramble almost supplied a second goal after 65 minutes but this time winger Adam Griffin shot just wide.
Hennessey didn't have a decent shot to save and Walsall's night of woe was complete when defender Ian Roper was stretchered off with suspected medial knee ligament damage.
