Product Description For tapered mainshaft Fits Comp Master and Rivera Pro clutch Seal not included American Prime Manufacturing Inc. Tapered Shaft Cluth Hub Nut at RevZilla Browse all RevZilla deals $15.99 In Stock at RevZilla Price verified 2d ago Buy Now at RevZilla Secure checkout Easy returns or compare prices Amazon eBay Product Details Brand American Prime Manufacturing Inc. Size OS Condition New MPN APM-2057-0003 American Prime Manufacturing Inc.