Sizing Guide

The Stemball/Open Selden Bronze Rigging Screw: A Detailed Overview

Introduction

The Stemball/Open Selden Bronze Rigging Screw is a specialized component in marine rigging, designed for durability, corrosion resistance, and optimal performance under heavy loads. Manufactured by Selden, a leading name in sailing hardware, this rigging screw is engineered to provide reliable tensioning while minimizing the risk of thread seizure.

Material and Construction

The body of the rigging screw is made from chrome-plated aluminum bronze, a material known for its exceptional strength and resistance to corrosion. The stemball terminal and open end are crafted from high-grade marine stainless steel, ensuring longevity and robustness. This combination reduces the risk of thread seizure under heavy loads, a common issue with all-stainless steel rigging screws.

Design Features

• Stemball/Open Configuration: One end features a stemball terminal, while the other is an open threaded end, allowing for flexible rigging applications.

• Adjustable Length: The screw allows for precise tensioning, with minimum and maximum lengths varying by size.

• Breaking Load Capacity: Ranges from 1,550 kg to 9,500 kg, depending on the thread and stemball size.

• Thread and Stemball Sizes: Available in multiple configurations, including 1/4" (9mm, 11mm), 5/16" (9mm, 11mm, 14mm), 3/8" (11mm, 14mm), 7/16" (11mm, 14mm), 1/2" (11mm, 14mm), and 5/8" (14mm).

Advantages Over Stainless Steel Rigging Screws

Unlike traditional all-stainless steel rigging screws, the bronze/stainless combination offers several advantages:

• Reduced Risk of Seizing: Stainless steel threads can seize under heavy loads due to galling. The bronze body mitigates this issue.

• Enhanced Corrosion Resistance: Bronze is highly resistant to marine corrosion, making it ideal for long-term use.

• Improved Longevity: The combination of materials ensures a longer lifespan compared to standard stainless steel screws.

Applications

The Stemball/Open Selden Bronze Rigging Screw is widely used in:

• Sailing Yachts: Essential for tensioning standing rigging.

• Architectural Rigging: Used in structural applications requiring high load-bearing capacity.

• Industrial Use: Suitable for heavy-duty tensioning in various engineering fields.

Conclusion

The Stemball/Open Selden Bronze Rigging Screw is a superior choice for marine and industrial rigging applications. Its bronze/stainless steel construction, high load capacity, and adjustable length make it a reliable and durable solution for demanding environments. Whether for sailing, architecture, or industrial use, this rigging screw ensures optimal performance and longevity.