{"product_id":"retaining-nut-for-mercruiser-stern-drive-shaft-housing-replaces-816811-1-35992-sierra-18-3752","title":"Sierra 18-3752 Stainless Steel Retaining Nut for Mercruiser Stern Drive Shaft Housing - Replaces 816811-1","description":"\u003cp\u003eThe Sierra 18-3752 is a stainless steel retaining nut engineered for the drive shaft housing on Mercruiser stern drive units. This nut secures the drive shaft housing assembly in place, and is manufactured to meet or exceed the specifications of the original equipment part it replaces. Sierra builds this component from stainless steel for corrosion resistance in the marine environment, with a fully threaded, right-hand Unified National Coarse (UNC) thread pattern and an inside thread size of M14. The flat-style head and coarse thread class are designed to provide a secure, reliable hold rated for a maximum shear strength between 1000 and 3000 lbf. Each package includes one retaining nut. As a direct fit for Mercruiser stern drive applications, it is intended as a straightforward replacement during drive shaft housing service or maintenance, and it carries the same fit and function expected from the original hardware 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 18-3752\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type:\u003c\/strong\u003e Unified National Coarse (UNC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Thread Size:\u003c\/strong\u003e M14\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Style:\u003c\/strong\u003e Right Hand\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 Coarse\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScrew Head Style:\u003c\/strong\u003e Flat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Shear Strength:\u003c\/strong\u003e 1000 to 3000 lbf\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 0.25 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999975959\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Mercruiser stern drive\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 retaining nut per package\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercruiser stern drive applications (drive shaft housing)\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e816811-1\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-3752 retaining nut fit?\u003c\/strong\u003e The Sierra 18-3752 is designed for the drive shaft housing on Mercruiser stern drive units.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the 18-3752 replace?\u003c\/strong\u003e It replaces OEM number 816811-1, and Sierra 18-3752 is manufactured to meet or exceed that original part's specifications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-3752 retaining nut made from?\u003c\/strong\u003e Stainless steel, chosen for corrosion resistance in marine environments where this drive shaft housing hardware operates.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many nuts come in a package?\u003c\/strong\u003e One retaining nut per package is included with the Sierra 18-3752.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the thread size and type on this nut?\u003c\/strong\u003e The 18-3752 has an M14 inside thread size with a fully threaded, right-hand Unified National Coarse (UNC) thread pattern.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-3752 nut?\u003c\/strong\u003e Item dimensions are 0.39 x 0.39 x 0.39 inches for the Sierra 18-3752 retaining nut.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-3752 weigh?\u003c\/strong\u003e The Sierra 18-3752 retaining nut weighs 0.25 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the maximum shear strength rating?\u003c\/strong\u003e This retaining nut is rated between 1000 and 3000 lbf maximum shear strength.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3752 an OEM or aftermarket part?\u003c\/strong\u003e It is an aftermarket replacement manufactured by Sierra to meet or exceed the performance of the original equipment part it replaces, 816811-1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat head style and drive type does this nut use?\u003c\/strong\u003e The 18-3752 has a flat screw head style and is configured for stern drive applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color and finish does the 18-3752 have?\u003c\/strong\u003e It has a white color with a stainless steel finish.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988165013723,"sku":"SIE-18-3752","price":30.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3752_lg__21167.1558126389.500.750.jpg?v=1785188196","url":"https:\/\/www.goodvibesmarina.com\/products\/retaining-nut-for-mercruiser-stern-drive-shaft-housing-replaces-816811-1-35992-sierra-18-3752","provider":"Good Vibes Marina","version":"1.0","type":"link"}