Ronstan Series 50 All Purpose Block with Fiddle, Becket, and Cleat - Model RF51530

Series 50 All Purpose Block - Fiddle - Becket - Cleat

Features

• Exceptionally high working loads
• Low maintenance, long service life
• Self-lubricating Acetal polymer sheave ensures low friction and extreme durability
• Captive Lock universal head
• Slotted pin shackle eliminates fouled lines
• Snap fit removable becket pin
• Multi-position cleat arm
• Spare Parts - RF51010 Replacement Becket Pin, RF150 Shackle

All purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.Captive Lock universal head can be fixed in either of two planes, or free to swivel as required. Quick adjusting cleat arms require no tools to adjust and fix securely in position. Becket pin is removable so line can be spliced prior to fitting and is i

Appllications:

• Mainsheet and halyard applications, vang and spinnaker control lines on boats to 10m (33ft)
• S60 - on boats up to 12m (40ft)
• Ideal for fine-tune mainsheet tackles, cunninghams, backstays and other control line purchase systems.

Materials:

• Grade 316 stainless steel load strap
• Impact and UV resistant, fiber reinforced Nylon cheeks

The Ronstan Series 50 All Purpose Block (Model RF51530) is designed for versatile sailing applications, providing reliable performance for both cruising and racing vessels up to 33 feet in length. Crafted with self-lubricating Acetal polymer sheaves running on polished stainless steel races, this block ensures low friction and exceptional durability under dynamic and static loads. Its high working load capacity makes it suitable for handling sheets, halyards, vang, and spinnaker control lines, making it a dependable choice for a variety of sailing needs.
Constructed with impact and UV resistant fiber-reinforced nylon cheeks and a Grade 316 stainless steel load strap, the Series 50 block offers long service life and minimal maintenance. The captive Lock universal head can be fixed in two planes or allowed to swivel, providing flexible line routing options. The quick-adjusting cleat arms enable tool-free position adjustments, while the removable becket pin allows for pre-splicing lines prior to installation, simplifying rigging procedures.
This all-purpose block features a slotted pin shackle to prevent fouling lines and a snap-fit becket pin for secure line management. Its compact design makes it ideal for fine-tuning mainsheet tackles, cunninghams, backstays, and other control line systems on boats up to 40 feet. Whether used on a cruising or racing vessel, the Ronstan Series 50 block delivers dependable performance and ease of use in demanding sailing environments.

Features:

• Exceptionally high working loads for multiple sailing applications

• Low maintenance with a long service life

• Self-lubricating Acetal polymer sheave for low friction and durability

• Captive Lock universal head with fixed or swivel positions

• Slotted pin shackle to prevent line fouling

• Snap-fit removable becket pin for easy pre-splicing

• Multi-position cleat arm for flexible line routing

• Includes replacement becket pin and shackle for convenience