Gary Hackett gave a run-out to former West Bromwich Albion youngster Aaron Birch in the first half, and the changes were rung after the interval with a total of 18 players used in all.
Playing up the considerable Lye Meadow slope in the first half, the Glassboys fell behind on 35 minutes when a long diagonal pass caught out Dan Scarr on the right side of the defence and Josh March controlled the ball before slotting past Charlie Price.
It took until the 85th minute for the visitors to level when persistence by Lee Chilton, and a good use of the advantage law by the referee as the Stourbridge man was held back, presented Insall with the chance to stab his shot home from 8 yards.
STOURBRIDGE LINE-UP: Price, Connolly (Green 45), Scarr (Hill 77), Tonks (Harris 70), Birch (Hayward 45), Pierpoint, Lait (Insall 45), Broadhurst, Smikle (McPike 77), Chilton, Canavan (Baldwin 70).