{"product_id":"sierra-18-3719-pinion-nut-for-chrysler-force-outboard-lower-units-replaces-11-35921-5-8-18-thread","title":"Sierra 18-3719 Pinion Nut - Replaces 11-35921 - 5\/8 Inch Hex Nut for Mercury Outboard Propeller Shafts","description":"\u003cp\u003eThe Sierra 18-3719 Pinion Nut is a 5\/8 inch hex pinion nut used on Mercury outboard propeller shaft assemblies. It is machined and built to meet or exceed the quality of the original equipment part it replaces, making it a reliable choice when servicing the lower gear housing or performing a pinion gear\/shaft rebuild. The nut secures the pinion gear onto the driveshaft, and correct torque on this fastener is critical to proper gear mesh and backlash in the lower unit.\u003c\/p\u003e\u003cp\u003eThis pinion nut is commonly ordered alongside related lower gear housing hardware, such as seal kits, washers, and tab washers, when a technician is already inside the gearcase. Each Sierra 18-3719 is sold individually and is manufactured to original fitment and thread specifications so it installs and torques the same as the factory nut it replaces.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-3719\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 5\/8 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastener Type:\u003c\/strong\u003e Hex\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Thread Size:\u003c\/strong\u003e #8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Groove Diameter:\u003c\/strong\u003e 0.63 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.03 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999875648\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eUsed on Mercury outboard propeller shaft \/ lower gear housing assemblies.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e11-35921\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-3719 pinion nut fit?\u003c\/strong\u003e The Sierra 18-3719 pinion nut is used on Mercury outboard propeller shaft and lower gear housing assemblies to secure the pinion gear onto the driveshaft.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does 18-3719 replace?\u003c\/strong\u003e This nut replaces OEM number 11-35921.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-3719 nut the same size as the original equipment nut?\u003c\/strong\u003e Yes, it is a 5\/8 inch hex pinion nut built to the same fitment and thread specifications as the OEM 11-35921 nut it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the pinion nut made of and how is it finished?\u003c\/strong\u003e The Sierra 18-3719 is a machined hex fastener with a machined exterior finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-3719 pinion nut?\u003c\/strong\u003e It measures 0.39 x 0.39 x 0.39 inches and has a compatible groove diameter of 0.63 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-3719 pinion nut weigh?\u003c\/strong\u003e This pinion nut weighs 0.03 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many pinion nuts come in one package?\u003c\/strong\u003e One Sierra 18-3719 pinion nut is included per package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-3719 genuine OEM or an aftermarket part?\u003c\/strong\u003e The 18-3719 is a Sierra-manufactured replacement part, built to meet or exceed the quality of the original equipment 11-35921 nut it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat other parts are typically replaced along with the pinion nut during a gear housing service?\u003c\/strong\u003e When installing a Sierra 18-3719 pinion nut, technicians often also replace the related lower gear housing seal kit, washer, and tab washer at the same time.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat thread size does the 18-3719 pinion nut use?\u003c\/strong\u003e The Sierra 18-3719 has an inside thread size of #8.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988162392283,"sku":"SIE-18-3719","price":4.44,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3719_lg__63052.1558126782.500.750.jpg?v=1785188473","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-3719-pinion-nut-for-chrysler-force-outboard-lower-units-replaces-11-35921-5-8-18-thread","provider":"Good Vibes Marina","version":"1.0","type":"link"}