Replacement shop vac filter nut will fit the following models: 4 Gallon :WD40500, WD40502, WD40700, WD4071, VAC4000 & VAC4010 , WD06200, WD06250, WD06350, WD0640, WD06700, WD06701 & WD0635M0. 9 Gallon :WD09700, WD9701, WD0975, WD0976, WD09350, WD09450, WD0947, WD09500, WD0957 & WD09701 11 Gallon :VAC11000 & WD70000 12 Gallon Wet/Dry Vac Models - WD1200, WD12001, WD12300, WD12450, WD1245CK, WD1245GV, WD1245VA, WD12460, WD1247, WD12500, WD12700, WD12701, WD1272C, WD12701, WD1276, WD12702, WD1273, WD12780 & WD16250. 16 Gallon :WD16300, WD16350, WD1635AC, WD1635RG, WD1635SD, WD1630, WD1637, WD16500, WD1665BG, WD1665BK, WD1665ST, WD16600, WD16650, WD16700 & WD16800, WD17300, WD17350 & WD17351,WD19500 & WD19560,WD18500,WD24500, WD03180 & WD0319