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Blog December 2025

When a Set Screw Plays a Part in a $327 Million Failure

Posted On: December 30, 2025

Most people are familiar with the infamous failure of the Mars Climate Orbiter, often citing the metric-to-imperial unit conversion error as the sole culprit. While that indeed played a critical role, a lesser-known contributing factor was something far smaller, yet equally devastating: loosened socket set screws in the guidance modules.

Imagine a journey spanning 140 million miles. Over that immense distance and extended timeframe, improper torquing and the absence of a crucial locking compound allowed these tiny set screws to gradually back out. This seemingly minor shift had major consequences, subtly altering the alignment of critical sensors within the orbiter's navigation system.

Those minute misalignments, compounded by the already flawed navigation data, meant that NASA's course corrections were fatally inaccurate. The result? The Mars Climate Orbiter entered the Martian atmosphere at a dangerously low altitude and was tragically destroyed, leading to a loss of $327 million and invaluable scientific opportunity.

🔧 The Lesson Learned: Small Components, Monumental Impact

This incident serves as a stark reminder: even the smallest components, like set screws, can have monumental implications. When they're responsible for maintaining precision alignment in a sophisticated navigation system traversing vast interstellar distances, their integrity is non-negotiable. "Good enough" simply isn't an option.

For applications in aerospace, defense, medical devices, or any field demanding absolute precision manufacturing, the quality and reliability of every single component are paramount. Specifications matter. Quality control matters. And ultimately, mission success depends on it.

At SESCO Precision, we understand the critical role that precision fasteners play in high-stakes environments. We specialize in manufacturing and supplying socket set screws with locking elements that meet the most stringent specifications, ensuring the reliability and performance your projects demand.

📩 Don't let a small component lead to a big problem.

If you're seeking a reliable partner for high-quality socket set screws and other precision fasteners, let's connect. Your mission's success is our priority.

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Satellites, Micro Shifts, and the Unsung Role of Set Screws

Posted On: December 17, 2025

Satellites are the workhorses of the modern world, orbiting Earth at incredible speeds of over 17,000 mph. They perform a vast array of critical functions, from enabling GPS navigation and global communications to monitoring weather patterns and Earth's climate. In this high-stakes environment, where every variable is meticulously calculated, precision is not just an advantage—it’s a fundamental requirement. A sensor shifting by even a fraction of a millimeter can throw off data, disrupt communication signals, or cause the satellite to deviate from its intended orbital path.

The Silent Guardians of Orbital Integrity

While we focus on the complex payloads and sophisticated technology, the reliability of a satellite often depends on its smallest components. This is where set screws play an indispensable, yet often overlooked, role. These compact fasteners are the unseen guardians of a satellite's precision, securing critical components like:

  • Sensors: Ensuring they remain in perfect alignment to collect accurate data, from atmospheric measurements to high-resolution imagery.
  • Antennas: Maintaining the exact orientation needed for stable communication links with ground stations.
  • Alignment Modules: Locking in place the internal parts that keep the entire spacecraft oriented correctly in space.

The challenge is immense. Once a satellite is deployed, it's virtually impossible to service. A set screw must withstand years, and often decades, of brutal conditions. It must endure the violent vibration of a rocket launch, the extreme thermal cycling between the sunlit and dark sides of Earth, and the unique challenges of microgravity, all while preventing even the tiniest of movements.

Engineered for Space, Built for Confidence

At SESCO Precision, we understand that a standard fastener cannot meet the demands of space. Our set screws are not just manufactured; they are engineered for survival in the orbital environment. This dedication to reliability begins with material science. We use specialized, high-performance materials that can withstand the intense radiation and extreme temperature fluctuations of space without degrading or outgassing, which could contaminate sensitive instruments.

Our manufacturing process incorporates advanced features to ensure mission success:

  • Special Coatings: We apply specific coatings that enhance durability and prevent corrosion, which can be caused by atomic oxygen in low Earth orbit.
  • Vibration-Resistant Features: Our set screws incorporate features designed to create a secure, permanent lock. This is critical for preventing loosening during launch and throughout the satellite's long lifespan.
  • Tight Tolerances: Every screw is machined to exacting standards, ensuring a perfect fit that minimizes any potential for movement.

In the unforgiving vacuum of space, there are no second chances. The smallest fastener must be mission-ready from the moment of launch. The success of a multi-million-dollar satellite mission and the vital services it provides hinges on the unwavering performance of every component, no matter how small. With SESCO, our hardware doesn't just hold parts together; it holds the mission together, delivering the confidence needed to reach for the stars. Learn more about fastener manufacturing. Have questions? Do not hesitate to reach out to us today!

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