Overview
For cruising and racing sailors, the Ronstan Series 40 triple swivel-head block handles sheet, halyard and control-line duties. Its self-lubricating sheaves accommodate both changing loads and sustained tension with little maintenance.
Key features
- Self-lubricating sheaves reduce maintenance demands.
- A slotted shackle pin helps keep lines from fouling.
- UV-stabilised sheaves and impact-resistant cheeks support durability aboard.
- Acetal sheaves run on polished stainless steel races to handle dynamic and static loads.
Specifications
- Series: 40 All Purpose
- Configuration: Triple block
- Head: Swivel with two-way head post
- Sheave material: UV-stabilised acetal polymer
- Cheek material: Impact- and UV-resistant, fibre-reinforced nylon
- Bearing race material: Grade 316 stainless steel
- Load strap and head fitting material: Grade 316 stainless steel
Good to know
Listed applications include mainsheet, halyard, vang and spinnaker control lines on off-the-beach catamarans, one-design classes and sportsboats up to 8m (26ft). Listed spare parts are the RF41010 replacement becket pin and RF150 shackle.
Specifications
| Brand | Ronstan |
|---|---|
| Manufacturer part # | RF41300 |
| UPC | 9316800557424 |
| Boxed dimensions | 4 x 3 x 2 in |
| Shipping weight | 0.4 lb |
| Country of origin | AUSTRALIA |
Shipping & returns
Free standard shipping
Standard shipping is free on every U.S. order — no minimum. Need it faster? Faster delivery options are available at checkout for qualifying orders. In-stock orders ship quickly with tracking; oversized and freight items may ship separately and can take a little longer. International rates are calculated at checkout.
30-day returns
Request a return within 30 days of delivery. Authorized returns are subject to a 15% restocking fee. Return shipping is paid by the buyer; items must be new and in original packaging. See our refund policy.
Genuine products
We source from authorized U.S. distributors. Every product is new, genuine and covered by the manufacturer warranty.
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