SKU: 41162026746

Ronstan Series 40 All Purpose Block - Single - Cheek

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Description

Ronstan Series 40 All Purpose Block - Single - CheekSeries 40 All Purpose Block Single Cheek All 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. Can be mounted on masts and booms using the curved surface

Series 40 All Purpose Block - Single - Cheek

All 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. Can be mounted on masts and booms using the curved surface adapter. Can be stacked to create a double version, but no more than 60% of the rated working load should be applied to the upper sheave.

Features:


  • Exceptionally high working loads


  • Low maintenance, long service life


  • Self-lubricating sheave


  • Mount with 3 x 5mm (3/16") fasteners (not supplied)



Applications:

  • Mainsheet


  • Halyard


  • Vang


  • Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8M(26')



Materials:

  • U.V. stabilized Acetal sheaves


  • Impact and U.V. resistant, fiber reinforced Nylon cheeks


  • Grade 316 stainless steel bearing race


  • Grade 316 stainless steel load strap and head fitting



Specifications:
Sheave : 40mm(1-9/16")
Max. Rope : 10mm(7/16")
M.W.L.: 400kg(880lbs)
B. L.: 1,000kg(2,200lbs)
Weight: 66g(2.3oz)

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SKU: 41162026746

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Dr. Kevin M. Derby
Omaha, US
★★★★★ 5
A Sweeping, Memorable Book From One of America's Greatest Historians
Format: Paperback
Bernard Bailyn offered this third volume of his “Peopling of British North America” by looking back at a far earlier period. Instead of looking at the 1760s and 1770s, Bailyn turned his attention to the seventeenth century. Always a fine writer, especially for an academic, Bailyn presented a sweeping look at the founding of Virginia, Maryland, New York, New England and other parts of the Atlantic coast. Bailyn was able to cover a great deal of ground, looking at Native Americans, Swedes, the Dutch and a host of various religious groups from England from the Pilgrims to Catholics. Scholars and general readers alike will profit from this look at the rough, often bloody, birth of America. It is easily one of the most memorable additions to colonial American history in recent years. Highly recommended.
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Reviewed in the United States on April 15, 2020
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Sheldon Sharray
Bozeman, US
★★★★★ 5
Perfect for law students taking criminal procedure
Format: Paperback
Goes perfectly with the textbook for law students and for anyone that needs to know the rules of criminal procedure. Very well put together.
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Reviewed in the United States on November 5, 2025
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Aidan Sophie Goldsmith
Lowell, US
★★★★★ 5
Lightweight, Readable Font, Great Quality
Format: Paperback, Format: Paperback
Excellent quality. No marks or damage; exactly as described. This has helped significantly in class. It is lightweight as well, which is nice considering most law books are not.
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Reviewed in the United States on October 15, 2025
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Chips
Natrona Heights, US
★★★★★ 5
Good condition
One of the books I needed for class :)
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Reviewed in the United States on August 26, 2022
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Indi
Battle Creek, US
★★★★★ 5
Great!
Format: Paperback
Great books. Big thanks to the authors for producing a legal text book that I feel good about buying!
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Reviewed in the United States on May 6, 2026

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