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877-240-8352 | Customer Service +1-214-960-4434 | International +1-817-729-4015 | WhatsApp, Pictures & SMS
Sailboat Rig Dimensions Sailboat Lines Selector Selection Guides Sailing Glossary Technical Advice Technical Literature Sailing Technical Videos Stay Tuned with Vela
FAQs Shipping & Delivery Returns & Exchanges

Ronstan Series 40 BB Block, Single Loop Top, Clevis Pin Top

Note: Some prices may reflect updates due to international tariffs. Learn the latest about tariffs
✖

Tariff Updates

We are observing how the tariffs are behaving. Lots of our products are imported from Europe and some of the manufacturers are not providing heads up about price increases. We will do everything in our power to hold the best prices, but please consider that in these uncertain times we may be forced to increase the prices without previous notification.

We really appreciate your understanding and look forward to working with you.

What does this mean for you?

  • Some imported products may show a higher price than usual.
  • Prices may change as shipping rates adjust globally.
  • We are committed to providing the best possible pricing and transparency at all times.

How we’re handling it:

  • We only adjust prices when absolutely necessary.
  • We continuously monitor shipping rates and update pricing accordingly.
  • We’ll clearly notify you if a product is affected by tariffs.

Questions? Feel free to contact our team for any clarification or assistance.

Updated: April 2025

MSRP: $99.95
$84.96
(You save $14.99 )
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SKU:
RONRF44108
UPC:
9316800208654
Availability:
Y
Weight:
0.50 LBS
Shipping:
Calculated at Checkout.
Size:
40 mm
Ronstan Series 40 BB Block, Single Loop Top, Clevis Pin Top
Manufacturer part #: RF44108
Technical Description
Features
American
Metric
Description
Series 40 BB Single Loop Top Block
Sheave Ø
1 9/16 in
40 mm
Maximum Rope Ø
1/4 in
6 mm
Pin Ø
7/32 in
6 mm
Maximum Working Load
530 lb
240 kg
Breaking Load
2430 lb
1100 kg
Weight
2.1 oz
60 g
Manufacturer part #: RF44108

  • Low friction Torlon® ball bearing system
  • Lightweight
  • Cheek cut-outs for easy bearing maintenance
  • Oversize Torlon® balls minimise friction

    • Alloy sheaves running on Torlon® ball bearings provide high performance & low friction.

    Applications
  • Primary lead blocks on dinghies and catamarans
  • Control lines on larger yachts

    • Materials
  • Torlon® ball bearings
  • Alloy sheave
  • Grade 316 stainless steel load strap and head fitting