RF418 - Ronstan 25mm Wire Block with Nylatron Sheave | Aztek Computers
29+Years
SKU: YLXQN3H1LQ |  Mfg. Part: RF418  | UPC: 9316800087280  | 
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RF418 - Ronstan 25mm Wire Block with Nylatron Sheave

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Condition: New

$31.04 
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Product Overview

Wire Block with Nylatron Sheave - 25mm Diameter

Designed specifically for halyards, vangs, and backstays, this wire block features a narrow sheave and groove for enhanced performance.

Applications:

Ideal for marine applications including halyards, vangs, and backstays.

Materials:

  • Grade 316 stainless steel cheeks
  • Nylatron sheave

Specifications:

  • Sheave Diameter: 25mm (1 inch)
  • Max. Cable Diameter: 3mm (1/8 inch)
  • M.W.L: 450kg (990lbs)
  • B.L.: 900kg (1,980lbs)
  • Weight: 40g (1.4oz)

Expert Overview

The Ronstan 25mm Wire Block with Nylatron Sheave, part number RF418, is a specialized component designed for managing wire ropes in demanding applications. Featuring a 25mm (1 inch) Nylatron sheave and Grade 316 stainless steel cheeks, this block is engineered for durability and corrosion resistance. Its narrow sheave and groove are optimized to enhance performance when used with wire up to 3mm (1/8 inch) in diameter. Weighing 40g (1.4oz), it offers a maximum working load (M.W.L) of 450kg (990lbs) and a breaking load (B.L.) of 900kg (1,980lbs). This wire block is primarily intended for marine applications such as halyards, vangs, and backstays, providing a reliable solution for systems requiring efficient wire management and high load capacity in a compact form factor.

Technical Specifications

  • Narrow sheave design for optimized performance
  • Durable construction with Grade 316 stainless steel
  • Lightweight and compact for easy handling
  • Suitable for a variety of marine applications
  • High working and breaking load limits

Product Details

  • Manufacturer:
  • Model Number:
  • UPC:
  • Condition:
  • Weight:
  • Dimensions:
  • Updated:
  • Added:
  • Country of Origin:
  • Ronstan
  • RF418
  • 9316800087280
  • New
  • 0.5 lbs
  • 4 X 1 X 2
  • Jul 19, 2026
  • May 16, 2026
  • ID
Product Identifiers: Brand: Ronstan • Part #: RF418 • UPC: 9316800087280 • Category: Pulleys, Block & Tackle

Frequently Asked Questions

What is the maximum cable diameter this wire block can accommodate?

The Ronstan 25mm Wire Block is designed to accommodate a maximum cable diameter of 3mm (1/8 inch).

What materials are used in the construction of this wire block?

This wire block features Grade 316 stainless steel cheeks for corrosion resistance and a Nylatron sheave for durability and optimized performance.

What are the primary applications for this product?

This wire block is ideal for marine applications, specifically designed for use with halyards, vangs, and backstays due to its narrow sheave and high load limits.

What are the working and breaking load limits for this block?

The Ronstan 25mm Wire Block has a Maximum Working Load (M.W.L) of 450kg (990lbs) and a Breaking Load (B.L.) of 900kg (1,980lbs).

RF418 - Ronstan 25mm Wire Block with Nylatron Sheave

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Reviews for Ronstan RF418

$31.04