{"product_id":"prop-nut-kit-for-yamaha-4-hp-and-5-hp-outboards-1984-1991-replaces-647-45616-02-sierra-18-3782","title":"Sierra 18-3782 Prop Nut Kit, White - Stainless Steel M14 Prop Nut, Spacer, Cotter Pin","description":"\u003cp\u003eThe Sierra 18-3782 Prop Nut Kit is a complete stainless steel hardware set for securing an outboard propeller to the shaft. The kit is finished in white and includes a machined prop nut, a spacer, and a cotter pin, giving you every fastener needed to reinstall or replace worn prop hardware in one purchase rather than sourcing each piece separately. The prop nut uses an M14 thread with a Class 2A right-hand Unified National Coarse (UNC) thread and a hex head\/hex fastener design for a secure, wrench-ready fit. Built from stainless steel, the kit resists the corrosion and salt exposure common in marine environments, helping the nut, spacer, and cotter pin hold up over repeated prop removal and reinstallation. The individual components are packaged together as a 4-piece set, so boaters performing routine propeller maintenance, prop swaps, or shear-pin\/hub service have matched hardware on hand. The Sierra 18-3782 is interchangeable with GLM 21251, Mallory 9-73992, and Yamaha 6G5-W4599-00-00, making it a straightforward replacement option when those cross-reference numbers are called out on an existing setup.\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 18-3782\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Prop Nut Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size:\u003c\/strong\u003e M14\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\u003eThread Style:\u003c\/strong\u003e Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Class:\u003c\/strong\u003e Class 2A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastener Type:\u003c\/strong\u003e Hex\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScrew Head Style:\u003c\/strong\u003e Hex\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Pieces:\u003c\/strong\u003e 4\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 0.56 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282240622\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e 18-3726 Prop Nut, 18-3735 Cotter Pin, 18-4274 Prop Spacer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross Reference \/ Interchange Numbers:\u003c\/strong\u003e GLM 21251, Mallory 9-73992, Yamaha 6G5-W4599-00-00\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGLM 21251\u003c\/li\u003e\n\u003cli\u003eMallory 9-73992\u003c\/li\u003e\n\u003cli\u003eYamaha 6G5-W4599-00-00\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the Sierra 18-3782 Prop Nut Kit?\u003c\/strong\u003e The kit contains three components: an 18-3726 prop nut, an 18-3735 cotter pin, and an 18-4274 prop spacer, packaged together as a 4-piece set.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat thread size does the 18-3782 prop nut use?\u003c\/strong\u003e The prop nut in the Sierra 18-3782 kit has an M14 thread with a Class 2A right-hand Unified National Coarse (UNC) thread pattern.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the Sierra 18-3782 Prop Nut Kit made from?\u003c\/strong\u003e It is made from stainless steel, which resists corrosion from saltwater and freshwater exposure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3782 kit interchangeable with other brands?\u003c\/strong\u003e Yes, the Sierra 18-3782 Prop Nut Kit is interchangeable with GLM 21251, Mallory 9-73992, and Yamaha 6G5-W4599-00-00.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-3782 Prop Nut Kit?\u003c\/strong\u003e The Sierra 18-3782 Prop Nut Kit is finished in white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-3782 Prop Nut Kit weigh?\u003c\/strong\u003e The kit weighs 0.56 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the components in the 18-3782 kit?\u003c\/strong\u003e The individual components measure approximately 0.39 x 0.39 x 0.39 inches each.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3782 kit include a cotter pin?\u003c\/strong\u003e Yes, an 18-3735 cotter pin is included along with the 18-3726 prop nut and 18-4274 prop spacer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat style of nut is used in the Sierra 18-3782 kit?\u003c\/strong\u003e The prop nut has a hex head with a hex fastener design for use with a standard wrench or socket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3782 Prop Nut Kit a genuine Sierra part?\u003c\/strong\u003e Yes, 18-3782 is the Sierra part number for this Prop Nut Kit, sold as a matched 4-piece hardware set.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988165439707,"sku":"SIE-18-3782","price":41.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3782_lg__20961.1558127526.500.750.jpg?v=1785187990","url":"https:\/\/www.goodvibesmarina.com\/products\/prop-nut-kit-for-yamaha-4-hp-and-5-hp-outboards-1984-1991-replaces-647-45616-02-sierra-18-3782","provider":"Good Vibes Marina","version":"1.0","type":"link"}