The parts book would provide all that information.

I'm not familiar with the model and don't know if it's a home machine or a commercial machine.

Dan you might want to go see a service center for that problem,quiet a few things that you have to re time when you replace that part,donot usually recommend this procedure if you can do it yourself,and if you have needle holes that bad not only bobbin rods butdrive rods for needle shaft off also, Its a great learning experience and hope all goes well.
harold gldnagr@otelco.net