This genuine McCormick 6520426X1 screw is an M8x20 fastener with an 8.8 strength rating, designed for various McCormick X-series tractor models. It is an OEM component crucial for secure and reliable fastening in applications including X4.20, X4.30, X4.40, X4.50, X5.35, X5.45, X5.55, X6.420, X6.430, X6.440, X7.440, X7.450, X7.460, X7.650, X7.660, X7.670, X7.680, X8.660, X8.670, X8.680, X8.690, X6.420 P6-Drive, X6.430 P6-Drive, X6.440 P6-Drive, X7.440 P6-Drive, X7.450 P6-Drive, X7.460 P6-Drive, X7.650 P6-Drive, X7.660 P6-Drive, X7.670 P6-Drive, X7.680 P6-Drive, X8.660 VT-Drive, X8.670 VT-Drive, X8.680 VT-Drive, and X8.690 VT-Drive.