{"product_id":"sierra-18-3730-lock-nut-for-omc-volvo-penta-sterndrives-replaces-omc-3852648-3853329-and-volvo-penta-3852648","title":"Sierra 18-3730 Lock Nut - Replaces OMC\/Volvo Penta 3852648","description":"\u003cp\u003eThe Sierra 18-3730 is a metal lock nut engineered as a direct replacement for OMC and Volvo Penta part 3852648. It is built to meet or exceed the quality of the original equipment part it replaces, making it a reliable choice for boat owners performing maintenance or repairs who want factory-equivalent fit and performance without sourcing a discontinued OEM part.\u003c\/p\u003e\u003cp\u003eThis lock nut is a fully threaded metric fastener with a hex head and a machined exterior finish. Its metal construction, using alloy steel and stainless steel, is designed to resist the corrosive marine environment while providing the clamping strength required for secure fastening. As a lock-style nut, it is intended to stay put under vibration, an important trait for hardware used on boats.\u003c\/p\u003e\u003cp\u003eThe Sierra 18-3730 falls under Sierra's Volvo Penta prop nut and washer offerings, reflecting its common use in propeller hardware and related assemblies where a dependable, corrosion-resistant lock nut is needed. Every Sierra part is manufactured to be interchangeable with the original equipment number it lists, so installation follows the same procedure as the OEM 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 18-3730\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Volvo Penta Prop Nuts \u0026amp; Washers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.02 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetal Type:\u003c\/strong\u003e Alloy Steel, Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastener Type:\u003c\/strong\u003e Lock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type:\u003c\/strong\u003e ISO Metric\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Style:\u003c\/strong\u003e Metric\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Coverage:\u003c\/strong\u003e Fully Threaded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Class:\u003c\/strong\u003e Class 2A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScrew Head Style:\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\u003eFinish Type:\u003c\/strong\u003e Brushed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions:\u003c\/strong\u003e 5.13 x 4 x 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282103347\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eUniversal marine fastener; consult the Replaces (OEM) list below to confirm compatibility with your specific application.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e3852648\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-3730 lock nut replace?\u003c\/strong\u003e The Sierra 18-3730 is a direct replacement for OMC and Volvo Penta part number 3852648.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3730 the same as the original OMC 3852648 nut?\u003c\/strong\u003e Yes, the Sierra 18-3730 is manufactured to meet or exceed the quality of the original OMC 3852648 part it replaces, so it installs and functions the same way.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-3730 lock nut made of?\u003c\/strong\u003e It is made of metal, specifically alloy steel and stainless steel, with a machined exterior finish for corrosion resistance in marine environments.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat thread type does the 18-3730 lock nut use?\u003c\/strong\u003e The 18-3730 uses an ISO metric thread, fully threaded with a Class 2A thread fit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-3730 lock nut weigh?\u003c\/strong\u003e The Sierra 18-3730 lock nut weighs 0.02 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat style of nut is the 18-3730?\u003c\/strong\u003e It is a lock-style nut with a hex head, designed to resist loosening from vibration once tightened.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the 18-3730 lock nut typically used for?\u003c\/strong\u003e Sierra lists the 18-3730 under its Volvo Penta prop nuts and washers category, making it suited for propeller hardware and similar fastening applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the Sierra 18-3730 fit hardware originally equipped with Volvo Penta 3852648?\u003c\/strong\u003e Yes, the 18-3730 is a direct replacement for Volvo Penta part 3852648 as well as the equivalent OMC number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many lock nuts come in one Sierra 18-3730 package?\u003c\/strong\u003e The Sierra 18-3730 is sold as a single lock nut.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the Sierra 18-3730 lock nut have?\u003c\/strong\u003e It has a machined, brushed exterior finish.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988162719963,"sku":"SIE-18-3730","price":3.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3730_lg__47783.1558127942.500.750.jpg?v=1785188885","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-3730-lock-nut-for-omc-volvo-penta-sterndrives-replaces-omc-3852648-3853329-and-volvo-penta-3852648","provider":"Good Vibes Marina","version":"1.0","type":"link"}