Ronstan RF51300 Series 50 Triple All Purpose Block with Swivel Head

The Ronstan Series 50 All Purpose Block (RF51300) is a high-performance triple block designed for mainsheet, halyard, vang, and spinnaker control line applications on boats up to 10m (33ft). Built for both cruising and racing environments, this block delivers exceptional working loads with minimal maintenance requirements.

Key Features:

• Self-lubricating Acetal polymer sheave on polished stainless steel races for low friction and extreme durability
• Lockable swiveling head post can be secured at 0° or 90° using the grub screw
• Slotted pin shackle design prevents line fouling
• Snap-fit removable becket pin for easy installation and maintenance
• Exceptionally high working loads for demanding applications
• Long service life with minimal maintenance requirements

Construction:

• Grade 316 stainless steel load strap for superior corrosion resistance
• Impact and UV resistant, fiber-reinforced Nylon cheeks
• Polished stainless steel races ensure smooth operation under both dynamic and high static loads

The Series 50 All Purpose blocks are engineered to perform equally well with dynamic loads and high static loads, making them ideal for sheets, halyards, and control line applications where reliability is critical.