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S&S CYCLE Thread Reducer (1/2"-13 to 5/16"-18) Ensure a secure, proper fit when upgrading your 1993–1999 Harley-Davidson cylinder heads. The S&S CYCLE Thread Reducer reduces a 1/2"-13 threaded hole to 5/16"-18 , helping you install carburetor support brackets using 5/16"-18 mounting bolts. Key Features Designed for '93–'99 Harley-Davidson cylinder heads during carburetor support bracket installation Converts 1/2"-13 threads to 5/16"-18 Made in the USA for reliable performance Specifications Material: Stainless Steel Riding Style: Street Color/Finish: Silver Units: Each Weight: 0.9 lbs Dimensions: 0.62" x 0.47" x 0.47"
Used on '93-'99 Harley-Davidson cylinder heads when installing a carburetor support bracket that requires 5/16"-18 mounting bolts