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Description
Ronstan Series 40 All Purpose Single Cheek BlockProduct Description Ronstan Series 40 All Purpose Single Cheek Block Features Exceptionally high working loads Low maintenance, long service life Self lubricating sheave Sheave 1 9 16 in. Max. Rope 1 2 in. Max. Cable in Pin in. M. W. L. 880 lb. B. L. 2200 lb. Weight 2. 3 oz. Product Information All purpose (AP) blocks are a great all around solution. Self lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well
Product Description
Ronstan Series 40 All Purpose Single Cheek Block
Features
Exceptionally high working loads
Low maintenance, long service life
Self-lubricating sheave
Sheave Ø - 1 9/16 in.
Max. Rope Ø - 1/2 in.
Max. Cable Ø - in
Pin Ø - in.
M.W.L. - 880 lb.
B. L. - 2200 lb.
Weight - 2.3 oz.
Product Information
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. Stackable with Ronstan Series 40 deck organizers.
Applications
Mainsheet
Halyard
Vang
Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)
Materials
U.V. stabilized Acetal sheaves
Impact and U.V. resistant, fiber reinforced Nylon cheeks
Grade 316 stainless steel bearing race
Alloy cheek plates
Features
Sheave Ø - 1 9/16 in.
Max. Rope Ø - 1/2 in.
Max. Cable Ø - in
Pin Ø - in.
M.W.L. - 880 lb.
B. L. - 2200 lb.
Weight - 2.3 oz.
Product Information
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. Stackable with Ronstan Series 40 deck organizers.
Applications
Materials
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 15 reviews
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Product Reviews
★★★★★ 4
A little pricey for what you get.
Size: 34W x 30L, Color: All My Days Selvedge
I like them.
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Reviewed in the United States on December 20, 2025
★★★★★ 5
Great buy
Size: 40W x 30L, Color: Midnight Selvedge
Great buy
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Reviewed in the United States on February 18, 2026
★★★★★ 2
Jeans size
Size: 31W x 30L, Color: Midnight Selvedge
Too small in waist.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 17, 2025
★★★★★ 5
Good pants I like em
Size: 34W x 34L, Color: Midnight Selvedge
Fit great nice fabric, a little thin for winter I’d say. There are small QC issues with the stitching.
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Reviewed in the United States on November 2, 2025
★★★★★ 1
Extremely thin material.
Size: 34W x 32L, Color: Midnight Selvedge
Really thin material. For the price I was expecting something closer to a buck mason quality fabric but these jeans are extremely light weight and I don’t expect them to last.
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Reviewed in the United States on April 20, 2026