{"product_id":"ronstan-rf681-series-30-utility-block-single-becket-with-loop-head","title":"Ronstan RF681 Series 30 Utility Block, Single Becket with Loop Head","description":"\u003cp\u003e\u003cstrong\u003eSeries 30 Utility Block - Single, Becket, Loop Head\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 in the block heads can be fitted with shackles, which can also be used to add 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 RF681 Series 30 Utility Block\u003c\/strong\u003e is a compact, lightweight block designed for sailors and boat owners who need dependable line handling in dinghy and yacht control systems. Its single sheave, becket-compatible loop head, and durable construction make it a practical choice for vang, cunningham, trapeze retriever, leech line, and bunk adjustment applications.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eBuilt with Grade 316 stainless steel cheeks and UV-stabilized Acetal sheaves, this Ronstan utility block is designed for durability in marine environments. The stainless steel cheeks provide a robust structure, while the Acetal sheave material supports reliable line movement and long service life. The block’s lightweight construction helps support efficient rigging without adding unnecessary weight.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe hollow rivets in the block head can be fitted with shackles, and the shackle arrangement can also be used to add a becket for extra purchase. This flexible design allows the RF681 to adapt to different rigging setups while maintaining a compact footprint. Use it on dinghies for vang, cunningham, and trapeze retriever systems, or on larger yachts for leech line tackles, bunk adjusters, and similar applications.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature:\u003c\/strong\u003e Lightweight, durable construction for practical marine rigging applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature:\u003c\/strong\u003e Single utility block with a loop head and becket-compatible design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature:\u003c\/strong\u003e Stainless steel cheeks and UV-stabilized Acetal sheave for long service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature:\u003c\/strong\u003e Maintenance-free design helps simplify ongoing use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature:\u003c\/strong\u003e Suitable for dinghy control systems and selected yacht adjustment tackles.\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 RF681\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Series 30 utility block\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Single, becket, loop head\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave Material:\u003c\/strong\u003e UV-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\u003eWeight:\u003c\/strong\u003e 0.96 lb\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplications:\u003c\/strong\u003e Vang, cunningham, trapeze retriever systems, leech line tackles, and bunk adjusters\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cp\u003eChoose the Ronstan RF681 Series 30 Utility Block for a durable, adaptable solution to everyday sailboat rigging needs.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Ronstan RF681 Series 30 utility block with single becket and loop head, stainless steel cheeks, and UV-stabilized Acetal sheave for marine rigging.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eLightweight, durable construction for practical marine rigging applications.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSingle utility block with a loop head and becket-compatible design.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eStainless steel cheeks and UV-stabilized Acetal sheave for long service life.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMaintenance-free design helps simplify ongoing use.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSuitable for dinghy control systems and selected yacht adjustment tackles.\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":44881642881113,"sku":"72293","price":34.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/72293XL.jpg?v=1789190766","url":"https:\/\/www.marinepartsonly.com\/products\/ronstan-rf681-series-30-utility-block-single-becket-with-loop-head","provider":"Marine Parts Only","version":"1.0","type":"link"}