Ronstan RF417 Series 30 Double Utility Block with Tube Rivet

The Ronstan RF417 is a Series 30 double utility block featuring a hollow tube rivet design that provides versatile mounting options for sailing applications. This compact marine block combines stainless steel cheeks with UV-stabilized Acetal sheaves for reliable performance in demanding marine environments.

Key Features:

• Double sheave configuration for 2:1 purchase systems
• Hollow tube rivet accepts fixing screws, shackles, or serves as a becket attachment point
• Grade 316 stainless steel cheeks for corrosion resistance
• UV-stabilized Acetal sheaves for long-lasting durability
• Lightweight yet durable construction
• Maintenance-free operation with no lubrication required

Common Applications:

• Vang, cunningham, and trapeze retriever systems on dinghies
• Leech line control tackles on sailboats
• Bunk adjusters and utility systems on larger yachts
• General-purpose control line routing

The Series 30 utility blocks are designed for economical performance where space is limited and moderate loads are expected. The combination of stainless steel and Acetal materials ensures years of reliable service with virtually no maintenance required.