This Throttle end linkage is an exact replacement of the John Deere original. One end is drilled to accept cotter pins which can be used on either the carburetor throttle or into the governor linkage The other end is threaded so that it threads into the throttle linkage This John Deere end throttle rod can be used in the speed control linkage of the governor this is also used on some tractors in both ends of the throttle to governor linkage.  Replaces John Deere Parts D2887R, A3889R, A4137R, A4138R