12 American Flyer Universal Knuckle Couplers with Rivets

Converts Link Couplers to Knuckle Couplers, 12 Knuckle Coupler Assemblies PA13CO38. American Flyer Sold Knuckle Couplers as No. 520, 521, 26520 or 26521. Replaces Knuckle Couplers: Has Hole for Knuckle Couplers that are Screwed On, Has Step Down on Shank Sides for Knuckle Coupler Clamps & Split to Convert Link Couplers to Knuckle Couplers.