This Avco Lycoming Conrod Nut with part number 74646 is a crucial component for your aircraft engine. Made in the United States, this nut ensures the secure attachment of the connecting rod to the crankshaft. It is compatible with various Lycoming engines, and is a must-have for engine maintenance,these nuts must not be reused. Please note that this item is being sold without a warranty. We recommend consulting with a licensed mechanic or technician to ensure proper installation.