Adapter nut, clutch (not for use with IPS crankshafts)
https://www.ludingtonhobbies.com/shop/4144-adapter-nut-clutch-not-for-use-with-ips-crankshafts-13799
https://www.ludingtonhobbies.com/web/image/product.template/13799/image_1920?unique=7165822
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Manufacturer's Part #: 4144
