{"product_id":"ronstan-rf417-series-30-double-utility-block-with-tube-rivet","title":"Ronstan RF417 Series 30 Double Utility Block with Tube Rivet","description":"\u003cp\u003e\u003cstrong\u003eSeries 30 Utility Block- Double, Tube Rivet\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLightweight durable construction\u003c\/li\u003e\n\u003cli\u003eEconomical\u003c\/li\u003e\n\u003cli\u003eMaintenance free\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Information:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eStainless steel cheeks and Acetal sheaves ensure a long service life with virtually no maintenance.Hollow rivets accept fixing screws, shackles or can be used as a becket for extra purchase.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eVang, cunningham and trapeze retriever systems on dinghies\u003c\/li\u003e\n\u003cli\u003eLeech line tackles, bunk adjusters etc on larger yachts\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eU.V. stabilized Acetal sheaves\u003c\/li\u003e\n\u003cli\u003eGrade 316 stainless steel cheeks\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eRonstan RF417 Series 30 Utility Block – Double, Tube Rivet\u003c\/strong\u003e is a lightweight, durable double block designed for practical sailboat and yacht control-line applications. Built for sailors, riggers, and boat owners, this economical utility block provides reliable line handling for vang, cunningham, trapeze retriever, leech line, and bunk adjustment systems while requiring virtually no maintenance.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe RF417 combines stainless steel cheeks with U.V.-stabilized Acetal sheaves for durable service in marine environments. Its double-sheave configuration supports efficient line routing, while the tube rivet design accepts fixing screws or shackles. The hollow rivet can also be used as a becket when additional purchase is needed, giving riggers more installation flexibility across a range of sailboat systems.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eUse the Ronstan Series 30 utility block on dinghies for vang, cunningham, and trapeze retriever systems. On larger yachts, it is suitable for applications such as leech line tackles and bunk adjusters. Its maintenance-free construction helps simplify ongoing equipment care, making it a practical choice for marine hardware installations where dependable, compact line control is required.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: Lightweight durable construction\u003c\/strong\u003e – Provides practical marine hardware performance without unnecessary bulk.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: Double utility block design\u003c\/strong\u003e – Supports efficient routing for a variety of sailboat control lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: U.V.-stabilized Acetal sheaves\u003c\/strong\u003e – Designed for durable use in boating applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: Grade 316 stainless steel cheeks\u003c\/strong\u003e – Provides corrosion-resistant marine construction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: Hollow tube rivet\u003c\/strong\u003e – Accepts fixing screws or shackles and can serve as a becket for extra purchase.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: Maintenance-free construction\u003c\/strong\u003e – Helps reduce routine upkeep requirements.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Ronstan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e RF417\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Double utility block with tube rivet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave material:\u003c\/strong\u003e U.V.-stabilized Acetal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheek material:\u003c\/strong\u003e Grade 316 stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended applications:\u003c\/strong\u003e Dinghy vang, cunningham, and trapeze retriever systems; larger-yacht leech line tackles and bunk adjusters\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cp\u003eChoose the Ronstan RF417 Series 30 Double Utility Block for versatile, low-maintenance line control in demanding sailing and rigging applications.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eSEO META DESCRIPTION:\u003c\/strong\u003e Shop the Ronstan RF417 Series 30 double utility block with tube rivet, Acetal sheaves, and stainless steel cheeks for marine rigging.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eLightweight durable construction – Provides practical marine hardware performance without unnecessary bulk.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eDouble utility block design – Supports efficient routing for a variety of sailboat control lines.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eU.V.-stabilized Acetal sheaves – Designed for durable use in boating applications.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eGrade 316 stainless steel cheeks – Provides corrosion-resistant marine construction.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHollow tube rivet – Accepts fixing screws or shackles and can serve as a becket for extra purchase.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMaintenance-free construction – Helps reduce routine upkeep requirements.\u003c\/li\u003e\u003c\/ul\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881642422361,"sku":"72299","price":38.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/72299XL.jpg?v=1789190708","url":"https:\/\/www.marinepartsonly.com\/products\/ronstan-rf417-series-30-double-utility-block-with-tube-rivet","provider":"Marine Parts Only","version":"1.0","type":"link"}