{"product_id":"ronstan-rf41300-series-40-triple-all-purpose-block-with-swivel-head","title":"Ronstan RF41300 Series 40 Triple All Purpose Block with Swivel Head","description":"\u003cp\u003e\u003cstrong\u003eSeries 40 All Purpose Block - Triple - Swivel Head\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 sheave\u003c\/li\u003e\n\u003cli\u003eSlotted pin shackle eliminates fouled lines\u003c\/li\u003e\n\u003cli\u003eTwo way head post\u003c\/li\u003e\n\u003cli\u003eSpare parts - RF41010 Replacement Becket Pin, RF150 Shackle\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.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMainsheet\u003c\/li\u003e\n\u003cli\u003eHalyard\u003c\/li\u003e\n\u003cli\u003eVang\u003c\/li\u003e\n\u003cli\u003eSpinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eU.V. stabilised Acetal sheaves\u003c\/li\u003e\n\u003cli\u003eImpact and U.V. resistant, fibre reinforced Nylon cheeks\u003c\/li\u003e\n\u003cli\u003eGrade 316 stainless steel bearing race\u003c\/li\u003e\n\u003cli\u003eGrade 316 stainless steel load strap and head fitting\u003c\/li\u003e\n\u003cli\u003eSheave: UV stabilised acetal\u003c\/li\u003e\n\u003cli\u003eCheeks: Impact modified, fiber reinforced and UV stabilized nylon\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eRonstan RF41300 Series 40 Triple All Purpose Block with Swivel Head\u003c\/strong\u003e is a durable marine line-handling block designed for cruising sailors, racing crews, one-design classes, sportsboats, and off-the-beach catamarans up to 26 feet. Its triple-sheave configuration supports mainsheet, halyard, vang, and spinnaker control line applications, while the swivel head helps provide versatile line direction and routing on deck.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eBuilt for demanding sailing environments, this all purpose block combines self-lubricating Acetal polymer sheaves with polished stainless steel races. The design performs with both dynamic loads and high static loads, making it a practical choice for frequently adjusted control lines as well as applications requiring dependable load handling. UV-stabilized materials and stainless steel components support low maintenance and a long service life in marine use.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe slotted pin shackle helps eliminate fouled lines, while the two-way head post supports flexible installation and operation. An impact- and UV-resistant, fiber-reinforced Nylon cheek construction adds durability to the block assembly. The Grade 316 stainless steel bearing race, load strap, and head fitting provide corrosion-resistant metal components for sailing applications. Spare parts are available separately, including the RF41010 Replacement Becket Pin and RF150 Shackle.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExceptionally high working loads for demanding sheet, halyard, and control line applications\u003c\/li\u003e\n\u003cli\u003eTriple self-lubricating Acetal sheaves running on polished stainless steel races\u003c\/li\u003e\n\u003cli\u003eSwivel head with two-way head post for flexible line alignment\u003c\/li\u003e\n\u003cli\u003eSlotted pin shackle helps eliminate fouled lines\u003c\/li\u003e\n\u003cli\u003eUV-stabilized, impact-resistant construction for cruising and racing use\u003c\/li\u003e\n\u003cli\u003eLow-maintenance design intended for a long service life\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\u003eSeries: 40\u003c\/li\u003e\n\u003cli\u003ePart Number: RF41300\u003c\/li\u003e\n\u003cli\u003eProduct Type: Triple all purpose block with swivel head\u003c\/li\u003e\n\u003cli\u003eSheaves: UV-stabilized Acetal\u003c\/li\u003e\n\u003cli\u003eCheeks: Impact-modified, fiber-reinforced, UV-stabilized Nylon\u003c\/li\u003e\n\u003cli\u003eBearing race, load strap, and head fitting: Grade 316 stainless steel\u003c\/li\u003e\n\u003cli\u003eApplications: Mainsheet, halyard, vang, and spinnaker control lines\u003c\/li\u003e\n\u003cli\u003eIntended use: Off-the-beach catamarans, one-design classes, and sportsboats up to 26 feet\u003c\/li\u003e\n\u003cli\u003eReplacement parts: RF41010 Replacement Becket Pin and RF150 Shackle\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cp\u003eChoose the Ronstan RF41300 for a versatile, durable block solution built to support reliable line handling across a wide range of sailing applications.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eSEO META DESCRIPTION:\u003c\/strong\u003e Shop the Ronstan RF41300 Series 40 triple swivel head block for durable, low-maintenance line handling on cruising and racing sailboats.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eWorking Load: Designed to accommodate exceptionally high working loads in demanding sailing applications.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eTriple Sheaves: Self-lubricating UV-stabilized Acetal sheaves run on polished Grade 316 stainless steel races.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSwivel Head: Two-way head post supports flexible line direction and routing.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSlotted Pin Shackle: Helps eliminate fouled lines during use.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eDurable Construction: Impact- and UV-resistant fiber-reinforced Nylon cheeks with Grade 316 stainless steel load components.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSailing Applications: Suitable for mainsheets, halyards, vangs, and spinnaker control lines on boats up to 26 feet.\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":44881671651417,"sku":"70600","price":93.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/70600XL.jpg?v=1789193766","url":"https:\/\/www.marinepartsonly.com\/products\/ronstan-rf41300-series-40-triple-all-purpose-block-with-swivel-head","provider":"Marine Parts Only","version":"1.0","type":"link"}