OMC part number 313623, 321861.

OMC Lock Nut

This nut is for use on many OMC Cobra stern drive and Evinrude Johnson outboard engines.

New OEM part.

Please check the part numbers for your fitment needs. If you are unsure whether this part fits your model, please contact us with your serial number and we can help determine if it is right for your engine.

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