$13.63$16.03per unit
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Special order from Ronstan — Estimated 2–4 weeks.
Description
Series 25 Utility Block™ - Single - Loop Head
Stainless steel cheeks and Acetal sheaves ensure a long service life with virtually no maintenance. Hollow rivets in the block heads can be fitted with shackles, which can also be used to add a becket for extra purchase.
Features:
Applications:
Materials:
Specifications:
Sheave Ø: 25mm(1")
Max. Rope Ø: 6mm(1/4")
M.W.L.: 300kg(660lbs)
B. L.: 600kg(1,320lbs)
Weight: 15g(0.5oz)
Stainless steel cheeks and Acetal sheaves ensure a long service life with virtually no maintenance. Hollow rivets in the block heads can be fitted with shackles, which can also be used to add a becket for extra purchase.
Features:
- Lightweight durable construction
- Economical
- Maintenance free
Applications:
- Vang, cunningham and trapeze retriever systems on dinghies
- Leech line tackles, bunk adjusters, etc on larger boats
Materials:
- U.V. stabilized acetal sheaves
- Grade 316 Stainless Steel cheeks
Specifications:
Sheave Ø: 25mm(1")
Max. Rope Ø: 6mm(1/4")
M.W.L.: 300kg(660lbs)
B. L.: 600kg(1,320lbs)
Weight: 15g(0.5oz)
Accessories
No accessories listed for this product.
Specifications
| SKU | RF571 |
| UPC | 9316800011070 |
| Brand | Ronstan |
| Category | Sailing |
| Country of Origin | ID |
| Weight | 0.1 |
| Dimensions | 4 x 2 x 1 |
| Status | Active |
| Last Synced | 10/8/2026, 2:04:48 AM |
Compliance & Shipping
Returnable
Product Literature
No literature or manuals available for this product.
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Frequently Bought Together
Compare Key Features
| Feature |  Ronstan Series 25 Utility Block - Single - Loop Head CURRENT |  Ronstan Series 30 Ball Bearing Orbit Block - Triple - Becket |  Harken 57mm Carbo Air Block w/Swivel |  Barton Marine Ratchet Block - 55mm |  Harken 16mm Block |
|---|---|---|---|---|---|
| Price | $13.63 | $57.81 | $53.93 | $111.66 | $17.21 |
| Brand | Ronstan | Ronstan | Harken | Barton Marine | Harken |
| Condition | New | New | New | New | New |
| Availability | Out of Stock | In Stock | In Stock | In Stock | In Stock |
| Weight | 0.1 | 0.19 | 0.3 | 0.3 | 0.1 |
| Dimensions | 4 x 2 x 1 | 4 x 2 x 2 | 6 x 3 x 1 | 6 x 3 x 2 | 3 x 2 x 1 |
| SKU | RF571 | RF35312 | 2600 | 90500 | 404 |
| Country | ID | INDONESIA | UNITED STATES | — | UNITED STATES |
| View Item | View Item | View Item | View Item | View Item |
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Frequently Asked Questions
Price
$13.63