![Ronstan Series 40 All Purpose Block - Single - Loop Top [RF41101]](https://www.yachtseatworks.com/wp-content/uploads/2026/10/ronstan-series-40-all-purpose-block-single-loop-top-rf41101.webp)
Series 40 All Purpose Block – Single – Loop Top
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.
Features:
- Exceptionally high working loads
- Low maintenance, long service life
- Self-lubricating sheave
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 Ø:t40mm(1-9/16″)
Max. Rope Ø:t10mm(7/16″)
Pin Ø: 5mm(3/16″)
M.W.L.:t400kg(880lbs)
B. L.:t1,000kg(2,200lbs)
Weight:t54g(1.9oz)
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