Ronstan Nylatron Sheave Box - Single Upright Lead Block

The Nylatron Sheave Box - Single Upright Lead Block is a high-performance solution designed specifically for marine and boating applications. It provides a low-profile and efficient method for routing halyards and other rig sail controls back to cleats or jammers, ensuring smooth and reliable sail handling on your vessel.

Features

• Customizable external tabs that can be shaped to match the spar profile before installation
• Low-profile design minimizes drag and interference with rigging
• Durable construction ensures long-lasting performance in harsh marine environments
• Easy installation with standard fasteners

Applications

The Nylatron Sheave Box is ideal for a variety of boating and marine applications, including:

• Dinghy spars for managing control lines such as outhauls
• Yacht rigging systems for leading halyards and sheets
• Catamaran sails for efficient sail adjustments
• Competitive sailing setups where precise sail control is essential

Materials

• Nylatron® sheave for smooth rotation and excellent resistance to saltwater corrosion
• Grade 316 stainless steel load housing providing superior strength and durability in marine conditions

Specifications

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

Why Choose the Nylatron Sheave Box?

Engineered for reliability and performance, the Nylatron Sheave Box ensures your sail controls operate smoothly even in the most demanding marine conditions. Its robust construction and customizable features make it a versatile choice for sailors looking to enhance their rigging systems.

Installation & Maintenance

Installing the Nylatron Sheave Box is straightforward with standard fasteners. To ensure optimal performance, regular maintenance is recommended, including cleaning the sheave and checking the fasteners for any signs of wear.

Customer Support

Our team is dedicated to providing you with the best support. If you have any questions or need assistance with your Nylatron Sheave Box, please contact our customer service team for expert advice.

Orders of physical products placed by 3 PM EST M-F typically ships the same day, if all requested items are in stock. Weekend orders will typically ship on Monday.

Shipping takes 2-7 days.

We currently ship to the Contiguous 48 States.

Life of Sailing merch is custom made for the customer after an order is placed. Total turnaround is typically 7-14 days from order to doorstep.