Ronstan Series 40 Fiddle Block
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Ronstan Series 40 Fiddle Block

Ronstan Series 40 Fiddle Block

  • Fiddle, Universal Head
  • Max Working Load: 770 Lbs, Max Line: 5/16"
  • Item #: 
    Model #: 
    Shipping Weight: 
    0.20 Lbs.
    List Price: 




    Fiddle, Universal Head

    Precision moulded Acetal sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.Captive Lock™ universal head can be fixed in either of two planes, or free to swivel as required.


    • Low friction, 2-stage ball bearing system
    • High static and dynamic load capacity
    • Lightweight
    • Cheek cut-outs for easy bearing maintenance
    • Captive Lock™ universal head
    • Slotted pin shackle eliminates fouled lines


    • Mainsheet
    • Halyard
    • Vang
    • Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)
    • Typically used in direct 4:1 purchase systems such as mainsheets and boom vangs
    • On larger boats they are used for fine-tune mainsheet tackles, outhauls, cunninghams, checkstays, genoa lead pullers and traveller controls.


    • Acetal ball bearings
    • UV Stabilized Acetal sheave
    • Grade 316 stainless steel load strap and head fitting
    • Impact and UV resistant, fibre reinforced Nylon cheeks


    Sheave Diameter
    1-9/16 + 15/16 in.
    Max Rope Diameter
    5/16 in.
    Max Cable Diameter
    - in
    Pin Diameter
    3/16 in.
    Max Working Load
    770 lb.
    Breaking Load
    2200 lb.
    3.2 oz.
    WARNING: This product MAY expose you to chemicals, which are known to the State of California to cause cancer, birth defects and/or other reproductive harm. For more information go to

    Ronstan Series 40 Block
    Item #: 613522
  • Fiddle, Becket, Adjustable Cleat, Universal Head
  • Max Working Load: 770 Lbs, Max Line: 5/16"
  •  Include

    Model #:

    Ronstan Series 40 Fiddle Block
    Item #: 613539
  • Fiddle Block with Universal Head
  • Safe Working Load: 880 lbs
  • Maximum Line Size: 5/16"
  •  Include

    Model #:

    Wichard Forged Shackle Key
    Item #: 607644
  • Accepts Up To 1/2" Shackles
  • Includes Bottle Opener
  •  Include

    Reg. Price

    Sale Price

    Model #:

    Davis Instruments Deluxe Rigging Knife
    Item #: 612768
  • Blade Type: Dura-Edged Straight, Includes 3" Marlin Spike, Key and Driver
  • Material: Stainless Steel
  • Blade Length: 2-1/2"
  •  Include

    Reg. Price

    Sale Price

    Model #:

    McLube Sailkote High Performance Dry Lubricant
    Item #: 608710DRLQUA
  • Applications: Sails, Hulls, Rigging, Deck Hardware and Anything that Moves
  • Forms a Hard, Smooth, Ultra-Slick, Hydrophobic Dry Coating
  • Will Not Attract Dirt or Contaminants, Container: Quart
  •  Include

    Reg. Price

    Sale Price

    Model #:

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