![Ronstan Series 25 Utility Block - Single - Swivel Shackle Head [RF573]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/ronstan-series-25-utility-block-single-swivel-shackle-head-rf573.webp)
Series 25 Utility Block – Single – Swivel Shackle 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:
- 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″)
Pin Ø: 4mm(5/32″)
M.W.L.:150kg(330lbs)
B. L.:300kg(660lbs)
Weight:20g(0.7oz)
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