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RONSTAN Series 50 All-Purpose Blocks

Strong, durable and economical blocks with a unique captive lock universal head fitting that allows the blocks to be fixed in either of two planes, or to swivel freely. Becket pins are removable for fitting spliced lines. White UV-stabilized acetal sheaves run on low-fiction, very low-maintenance solid bearings. Loads are transferred directly from the sheave axle to the head post by the one-piece 316 stainless steel load straps. Hi-load (Model 160932) is wire rope-compatible.

  • Sheave: UV stabilized Acetal
  • Bearings: Low-friction plain bearings
  • Sheave Size: 2" (50mm)
  • Line Diameter: 1/2" max.
  • Cheek Material/Finish: Stainless and fiber-reinforced textured Zytel
  • Shackle/Strap Type: Universal head shackle. Either locks (0° or 90°) or swivels
Customer Reviews
Product Models
Description WM Model # MFG Part # Availability Price Quantity  
All-Purpose Block, Single, Hi-Load, 1,764lb. SWL, 4.1oz. 160833 RF50100HL
In stock online.

$56.87

All-Purpose Block, Single Turning, Hi-Load, 1,764lb. SWL, 4.0oz. 160932 RF50171HL
In stock online.

$62.01

All-Purpose Block, Single, 1,650lb. SWL, 4.1oz. 149687 RF51100
In stock online.

$29.96

All-Purpose Block, Single, Loop Top, 1,650lb. SWL, 3.4oz. 149703 RF51101
Ships when available.

$28.90

All-Purpose Block, Single/Becket, 1,650lb. SWL, 4.7oz. 149943 RF51110
In stock online.

$42.46

All-Purpose Block, Single/Becket, Loop, 1,650lb. SWL, 4.0oz. 149950 RF51111
In stock online.

$35.87

All-Purpose Block, Double, 2,200lb. SWL, 8.9oz. 149968 RF51200
In stock online.

$63.71

All-Purpose Block, Double/Becket, 2,200lb. SWL, 9.5oz. 149976 RF51210
In stock online.

$72.21

All-Purpose Block, Triple, 2,650lb. SWL, 2.9oz. 149984 RF51300
In stock online.

$84.96

All-Purpose Block, Fiddle, 1,650lb. SWL, 5.9oz. 149992 RF51500
In stock online.

$56.87

All-Purpose Block, Fiddle/Becket, 1,650lb. SWL, 6.2oz. 150008 RF51510
In stock online.

$62.01

All-Purpose Block, Fiddle/Becket, Cleat, 1,650lb. SWL, 11.1oz. 150016 RF51530
In stock online.

$110.46

Product Description

Strong, durable and economical blocks with a unique captive lock universal head fitting that allows the blocks to be fixed in either of two planes, or to swivel freely. Becket pins are removable for fitting spliced lines. White UV-stabilized acetal sheaves run on low-fiction, very low-maintenance solid bearings. Loads are transferred directly from the sheave axle to the head post by the one-piece 316 stainless steel load straps. Hi-load (Model 160932) is wire rope-compatible.

  • Sheave: UV stabilized Acetal
  • Bearings: Low-friction plain bearings
  • Sheave Size: 2" (50mm)
  • Line Diameter: 1/2" max.
  • Cheek Material/Finish: Stainless and fiber-reinforced textured Zytel
  • Shackle/Strap Type: Universal head shackle. Either locks (0° or 90°) or swivels

Specs

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REVIEW SNAPSHOT®

by PowerReviews
RonstanSeries 50 All Purpose Blocks
 
3.8

(based on 5 reviews)

Ratings Distribution

  • 5 Stars

     

    (1)

  • 4 Stars

     

    (3)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Easy to use (4)
  • Well built / quality (4)

Cons

    Best Uses

    • Sailing (5)
      • Reviewer Profile:
      • Casual/ recreational (3)

    Reviewed by 5 customers

    Sort by

    Displaying reviews 1-5

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    5.0

    Nice block at a reasonable price

    By Bill

    from Gulf Shores, Alabama

    About Me Casual/ Recreational

    Verified Buyer

    Pros

    • Attractive Design
    • Easy To Install
    • Easy To Use

    Cons

      Best Uses

      • Sailing

      Comments about Series 50 All Purpose Blocks:

      Use blocks to replace worn out Shaffer blocks use with 1/2 roller reefing line on foresail. Made a big difference in reducing drag on the line during unfurling of the foresail.

      Service and delivery comments:

      Prompt delivery with a great product.

       
      2.0

      damaged block

      By Lenny

      from West Palm Beach, FL

      About Me Professional

      Verified Buyer

      Pros

      • Quality Construction

      Cons

        Best Uses

        • Sailing

        Comments about Series 50 All Purpose Blocks:

        The block suits its purpose very well. The block delivered had deep scour groves in the cheek.

         
        4.0

        Simple, but durable

        By The Adventure

        from Sarasota fl

        About Me Casual/ Recreational

        Verified Reviewer

        Pros

        • Easy To Install
        • Easy To Use
        • Quality Construction

        Cons

          Best Uses

          • Sailing

          Comments about Series 50 All Purpose Blocks:

          It was hard to find in stores, but once I found it and purchased...It was ready to go, simple

           
          4.0

          Good Value for Money

          By Small Axe

          from Naramata, BC

          About Me Casual/ Recreational

          Verified Buyer

          Pros

          • Easy To Use
          • Quality Construction

          Cons

            Best Uses

            • Sailing
            • Small Boats

            Comments about Series 50 All Purpose Blocks:

            If you are a recreational sailor this product strikes the right balance between quality and price.

             
            4.0

            Does the job

            By fishnski

            from CB, NC

            About Me Advanced

            Verified Buyer

            Pros

            • Easy To Use
            • Quality Construction

            Cons

            • Picture does not match

            Best Uses

            • Personal Watercraft
            • Sailing
            • Small Boats

            Comments about Series 50 All Purpose Blocks:

            The product works fine. The only issue was the picture in the catalog does not match the unit but it does the job for me in docking my boat

            Displaying reviews 1-5

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            Questions about this Product?
            1 (800) 262-8464