Ronstan RF45521 40mm fiddle block with cleat and becket Ronstan RF45521 40mm fiddle block with cleat and becket
Ronstan RF45521 40mm fiddle block with cleat and becket

Ronstan

Ronstan RF45521 40mm Fiddle Block with Becket & Cam Cleat | Series 40

$189.00
Tax included.

The Ronstan RF45521 is a versatile and compact 40mm fiddle block featuring an integrated becket and cam cleat, engineered for efficient multi-part control systems. Part of the durable Ronstan Series 40, this block is ideal for vangs, outhauls, cunninghams, and mainsheet controls on dinghies, keelboats, and small yachts.

Built with a UV-stable acetal sheave, ball bearing system, it offers smooth operation and long-term performance. The cam cleat allows quick line locking and release—perfect for hands-free control in dynamic sailing environments.

✅ Key Features

  • Ronstan RF45521 – 40mm fiddle block with becket and cam cleat

  • Ball bearing sheaves for smooth, low-friction line handling

  • Integrated becket for use in purchase systems

  • Cam cleat for quick, secure line locking and adjustment

  • UV-resistant acetal sheave and stainless steel cheeks

  • Ideal for vang, outhaul, cunningham, and mainsheet systems

  • Suited for dinghies, keelboats, and performance cruisers

  • Part of the Ronstan Series 40 sailing hardware range

Ronstan RF45521 40mm Fiddle Block with cleat specifications:

  • Sheave Ø 40 + 22 mm
  • Max. Rope Ø 9 mm
  • M.W.L. 325 kg
  • B. L. 700 kg
  • Weight 108 g