The Ronstan Series 50 All Purpose Fiddle Block with becket is designed for high performance in both cruising and racing applications, including mainsheet, halyard, vang, and spinnaker control line systems. This block features a self-lubricating Acetal polymer sheave on polished stainless steel races, providing low friction and durability for high static and dynamic loads.
- Construction: Grade 316 stainless steel load strap with impact and UV-resistant, fiber-reinforced Nylon cheeks.
- Head: Captive Lock universal head can be fixed in two planes or left to swivel.
- Becket: Snap-fit removable becket pin allows for pre-splicing of lines and locks without tools or split rings.
- Compatibility: Suitable for boats up to 10m (33ft).
- Shackle: Includes a slotted pin shackle to prevent fouled lines.
- Manufacturer Part Number: RF51510.
- Spare Parts: Compatible with RF51010 replacement becket pin and RF150 shackle.
These blocks are suited for fine-tune mainsheet tackles, cunninghams, backstays, and other purchase systems requiring reliable performance and longevity.
Product facts
- CT SKU
- CT-114661
- Model / MPN
- RF51510
- UPC / GTIN
- 9316800241347
- Package dimensions
- 1" X 4" X 7"
- Package weight
- 0.42 lb
Fit-sensitive item: confirm measurements, model numbers, and manufacturer details before ordering. Tug & Tow does not guarantee universal compatibility from a product page alone.
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Shipping & returns
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Fit & compatibility
Fit & compatibility
Review the product title, description, images, dimensions, part numbers, and manufacturer details before purchase. For fit-sensitive items, confirm compatibility with your boat, RV, trailer, vehicle, or equipment.
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Need help choosing?
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