{"product_id":"ronstan-rf51510-series-50-all-purpose-fiddle-becket-block","title":"Ronstan RF51510 Series 50 All Purpose Fiddle Becket Block","description":"\u003cp\u003e\u003cstrong\u003eSeries 50 All Purpose Block - Fiddle - Becket\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\u003eCaptive Lock universal head\u003c\/li\u003e\n\u003cli\u003eSlotted pin shackle eliminates fouled lines\u003c\/li\u003e\n\u003cli\u003eSnap fit removable becket pin\u003c\/li\u003e\n\u003cli\u003eSpare Parts - RF51010 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.Captive Lock universal head can be fixed in either of two planes, or free to swivel as required. Becket pin is removable so line can be spliced prior to fitting and is ingeniously locked into position without the use of a clevis pin, split ring or tools\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\u003cli\u003eIdeal for fine-tune mainsheet tackles, cunninghams, backstays and other control line purchase systems.\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\u003e\u003cstrong\u003eRonstan RF51510 Series 50 All Purpose Fiddle Becket Block\u003c\/strong\u003e delivers a versatile, durable solution for sailors who need dependable control of sheets, halyards, and purchase systems. Designed for cruising and racing applications, this fiddle becket block combines high working loads, low friction, and practical line-handling features for mainsheet systems, vang controls, spinnaker controls, cunningham tackles, backstays, and other onboard applications.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe self-lubricating Acetal polymer sheave runs on polished stainless steel races to support smooth operation with both dynamic and high static loads. Its construction is intended to provide low maintenance and a long service life, while the impact- and UV-resistant, fiber-reinforced Nylon cheeks add durability for demanding marine use. The Grade 316 stainless steel load strap provides a robust foundation for the block assembly.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe Captive Lock universal head can be fixed in either of two planes or left free to swivel as needed, giving sailors flexibility when configuring running rigging. A slotted pin shackle helps reduce the risk of fouled lines, while the snap-fit removable becket pin allows line splicing before installation. The becket pin locks into position without requiring a clevis pin, split ring, or tools. This Series 50 block is suited for mainsheet and halyard applications, vang and spinnaker control lines on boats up to 33 feet, and fine-tune control systems where an efficient fiddle becket arrangement is needed.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh working loads:\u003c\/strong\u003e Supports demanding dynamic and static marine line-handling applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelf-lubricating Acetal sheave:\u003c\/strong\u003e Provides low-friction operation and durable performance on polished stainless steel races.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaptive Lock universal head:\u003c\/strong\u003e Can be fixed in two planes or allowed to swivel according to the rigging setup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemovable becket pin:\u003c\/strong\u003e Allows line splicing before installation and locks into place without tools.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSlotted pin shackle:\u003c\/strong\u003e Helps prevent lines from becoming fouled during use.\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 RF51510\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Series 50 all purpose fiddle becket block\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterials:\u003c\/strong\u003e Grade 316 stainless steel load strap; impact- and UV-resistant, fiber-reinforced Nylon cheeks; Acetal polymer sheave\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplications:\u003c\/strong\u003e Mainsheets, halyards, vang and spinnaker control lines, cunningham tackles, backstays, and other control line purchase systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended boat use:\u003c\/strong\u003e Applications on boats up to 33 feet; S60 applications are for boats up to 40 feet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplacement parts:\u003c\/strong\u003e RF51010 replacement becket pin and RF150 shackle\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cp\u003eChoose the Ronstan RF51510 Series 50 All Purpose Fiddle Becket Block for a practical, serviceable, and versatile addition to your boat’s running rigging.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Ronstan RF51510 Series 50 fiddle becket block delivers low-friction, durable control for mainsheets, halyards, vangs, and marine rigging systems.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eHigh working loads: Supports demanding dynamic and static marine line-handling applications.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSelf-lubricating Acetal polymer sheave: Delivers low-friction operation and durable performance on polished stainless steel races.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eCaptive Lock universal head: Can be fixed in two planes or left free to swivel for flexible rigging configurations.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSlotted pin shackle: Helps reduce the chance of fouled lines during use.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSnap-fit removable becket pin: Allows line splicing before installation and locks into position without tools.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eDurable marine construction: Combines a Grade 316 stainless steel load strap with impact- and UV-resistant, fiber-reinforced Nylon cheeks.\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":44881668898905,"sku":"70687","price":86.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/70687XL.jpg?v=1789193512","url":"https:\/\/www.marinepartsonly.com\/products\/ronstan-rf51510-series-50-all-purpose-fiddle-becket-block","provider":"Marine Parts Only","version":"1.0","type":"link"}