{"product_id":"ronstan-rf51300-series-50-all-purpose-triple-block-for-sailboat-sheets-halyards-and-control-lines","title":"Ronstan RF51300 Series 50 All Purpose Triple Block for Sailboat Sheets, Halyards and Control Lines","description":"\u003cp\u003e\u003cstrong\u003eSeries 50 All Purpose\u003c\/strong\u003e\u003cstrong\u003eBlock - Triple\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExceptionally high working loads\u003c\/li\u003e\n\u003cli\u003eLow maintenance, long service life\u003c\/li\u003e\n\u003cli\u003eSelf-lubricating Acetal polymer sheave ensures low friction and extreme durability\u003c\/li\u003e\n\u003cli\u003eSlotted pin shackle eliminates fouled lines\u003c\/li\u003e\n\u003cli\u003eLockable swiveling head post\u003c\/li\u003e\n\u003cli\u003eSnap fit removable becket pin\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eAll purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.Head can be locked at 0 or 90 by engaging the grub screw in either the 0 or 90 degree position.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMainsheet and halyard applications, vang and spinnaker control lines on boats to 10m (33ft)\u003c\/li\u003e\n\u003cli\u003eS60 - on boats up to 12m (40ft)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGrade 316 stainless steel load strap\u003c\/li\u003e\n\u003cli\u003eImpact and UV resistant, fiber reinforced Nylon cheeks\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003eThe Ronstan RF51300 Series 50 All Purpose Triple Block is a durable, versatile sailing block designed for cruising and racing applications. Its triple-sheave configuration supports mainsheets, halyards, vangs and spinnaker control lines on boats up to 33 feet, while the Series 50 design also suits demanding dynamic and high static load conditions. With low friction, durable construction and flexible installation features, this Ronstan triple block provides a practical solution for a wide range of sailboat control systems.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eSelf-lubricating Acetal polymer sheaves run on polished stainless steel races to help reduce friction and support a long service life with low maintenance. The impact- and UV-resistant fiber-reinforced Nylon cheeks are paired with a Grade 316 stainless steel load strap for dependable construction. A slotted pin shackle helps prevent fouled lines, while the lockable swiveling head post can be secured at 0 or 90 degrees by engaging the grub screw in the selected position.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe snap-fit removable becket pin makes servicing and line arrangement more convenient. This all purpose block is intended for mainsheet and halyard applications, as well as vang and spinnaker control lines. Series 50 blocks are suitable for boats up to 33 feet, and the manufacturer also identifies S60 applications for boats up to 40 feet. Whether outfitting a cruising sailboat or preparing a racing control system, the Ronstan RF51300 delivers versatile performance in a compact, serviceable design.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFeature: Triple-sheave all purpose block for sheets, halyards and control lines\u003c\/li\u003e\n\u003cli\u003eFeature: Self-lubricating Acetal polymer sheaves help reduce friction and support durability\u003c\/li\u003e\n\u003cli\u003eFeature: Polished stainless steel races support dynamic and high static load applications\u003c\/li\u003e\n\u003cli\u003eFeature: Slotted pin shackle helps eliminate fouled lines\u003c\/li\u003e\n\u003cli\u003eFeature: Lockable swiveling head post secures at 0 or 90 degrees\u003c\/li\u003e\n\u003cli\u003eFeature: Snap-fit removable becket pin simplifies line arrangement and service\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBrand: Ronstan\u003c\/li\u003e\n\u003cli\u003eModel: RF51300\u003c\/li\u003e\n\u003cli\u003eProduct type: Series 50 All Purpose Triple Block\u003c\/li\u003e\n\u003cli\u003eLoad strap: Grade 316 stainless steel\u003c\/li\u003e\n\u003cli\u003eCheeks: Impact- and UV-resistant fiber-reinforced Nylon\u003c\/li\u003e\n\u003cli\u003eSheaves: Self-lubricating Acetal polymer\u003c\/li\u003e\n\u003cli\u003eIntended use: Mainsheet, halyard, vang and spinnaker control line applications\u003c\/li\u003e\n\u003cli\u003eRecommended boat size: Up to 33 feet for Series 50 applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cp\u003eChoose the Ronstan RF51300 Series 50 Triple Block for a reliable, versatile solution to common sailboat rigging and control-line needs.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e\u003cbr\u003eShop the Ronstan RF51300 Series 50 Triple Block for sailboat sheets, halyards and control lines, with durable sheaves and a lockable swivel head.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eTriple-sheave all purpose block for sheets, halyards and control lines\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSelf-lubricating Acetal polymer sheaves help reduce friction and support durability\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePolished stainless steel races support dynamic and high static load applications\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSlotted pin shackle helps eliminate fouled lines\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eLockable swiveling head post secures at 0 or 90 degrees\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSnap-fit removable becket pin simplifies line arrangement and service\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":44881668997209,"sku":"70685","price":118.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/70685XL.jpg?v=1789193533","url":"https:\/\/www.marinepartsonly.com\/products\/ronstan-rf51300-series-50-all-purpose-triple-block-for-sailboat-sheets-halyards-and-control-lines","provider":"Marine Parts Only","version":"1.0","type":"link"}