FIX THAT LOO SE WOBBLY SEAT. THESE RUBBER FITTINGS WILL FIT BOTH M6 (6mm) OR M8 (8mm) THREADED RODS. This type of hinge can have M6 (6mm) or M8 (8mm). Approx 95% of hinges are M6 (6mm). Also as the rubber fitting is compressed it pulls the hinge tightly down onto the bowl.