One New Aftermarket Replacement Fits FordNew Holland Clutch Plate Disc that fits Tractor models600, 700, 800, 900 5speed transmission, prior to SN 14257, 1953 to 1957, 501, 601, 701, 801, 901, 4 5speed transmissions, SN 14257 up, 1958 to 196410 heavyduty15spline1 hubCan replace NDA7550BReplaces Part NumbersE8NN7550FA, C0NN7550C, NDA7550B.