Ronstan Nylatron Sheave Box Single Upright Lead Block RF453 for Rig Control Lines

Nylatron Sheave Box - Single Upright Lead Block

Lead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers.When mounted in an inverted position, are frequently used as upright leads.

Features:
The external tabs can be formed to fit the spar profile before fastening

Applications:
Typically used in dinghy spars for control lines such as outhauls

Materials:

• Nylatron sheave
  
• Grade 316 stainless steel load housing

Specifications:
Sheave : 22mm(7/8")
Max. Rope : 3mm(1/8")
Max. Cable : 3mm(1/8")
Fastener : 5mm(3/16")
M.W.L.: 160kg(350lbs)
B. L.: 350kg(700lbs)
Weight: 30g(1.1oz)

The Ronstan Nylatron Sheave Box RF453 is a high-quality, low-profile solution designed for guiding halyards and other rig sail controls back to cleats or jammers. When mounted in an inverted position, this lead block is frequently used as an upright lead, providing a reliable and efficient way to manage control lines on dinghies and small sailing vessels. Its durable construction ensures long-lasting performance in demanding marine environments. The sheave features a 7/8 inch diameter made from tough Nylatron material, capable of handling ropes and cables up to 1/8 inch in diameter. The load housing is crafted from Grade 316 stainless steel, offering corrosion resistance and strength, with a maximum working load limit of 350 pounds and a breaking load of 700 pounds. The external tabs can be custom-formed to fit the spar profile prior to fastening, ensuring a secure fit and optimal alignment for your rig setup. This versatility allows for easy installation on various spar profiles, making it a flexible component for sailboat control systems. Ideal for applications such as controlling outhauls and other sail adjustments, the RF453 is engineered for performance and durability. Weighing only 1.1 ounces, this lead block is lightweight yet robust, designed to withstand the rigors of sailing. Its compact size and sturdy construction make it an excellent choice for sailors seeking reliable line management solutions that combine ease of installation with long-term durability. Whether used in racing or cruising applications, this lead block from Ronstan enhances the efficiency and safety of your rigging setup, contributing to smoother sail handling and improved vessel control.

Features:

• External tabs can be formed to fit spar profile before fastening

• Made from durable Nylatron sheave with corrosion-resistant Grade 316 stainless steel housing

• Suitable for guiding control lines up to 1/8 inch in diameter

• Lightweight design at approximately 1.1 ounces for easy handling

• Designed for use as upright lead when mounted in an inverted position

• Maximum working load limit of 350 pounds and breaking load of 700 pounds