Extension Spring YRZHKS 9669 4-Inch 9/16″ OD Single Loop Pack of 4

Description

Product Overview

The YRZHKS 9669 extension spring is engineered for precision and durability in a compact form factor. Measuring exactly 4 inches in length with a 9/16‑inch outer diameter, the spring features a single‑loop open end that simplifies attachment to both fixed and moving components. Crafted from high‑grade spring steel, the wire diameter of 0.047 inch provides a balance of flexibility and strength, allowing the spring to compress and extend smoothly while maintaining its shape over thousands of cycles. The nickel‑plated coating adds a corrosion‑resistant layer, making the spring suitable for indoor and outdoor environments where moisture or chemicals might be present. Each package contains four individually wrapped springs, ensuring they arrive protected and ready for immediate installation.

Performance specifications highlight the spring’s capability to handle a maximum safe load of 6.7 lb, with a maximum deflection of 7.42 inches when fully extended. This load capacity makes the spring ideal for applications that require modest force, such as resetting mechanisms, cushioning pads, or light‑weight clamping tasks. The consistent spring rate ensures predictable behavior, reducing the need for frequent adjustments or replacements. Because the spring is made from tempered steel, it resists fatigue and maintains its elasticity even after repeated compression cycles, delivering reliable operation in demanding industrial or consumer settings.

The product’s packaging dimensions of 4.45 × 3.62 × 0.47 inches and a weight of just 3.35 ounces per pack reflect its lightweight nature, facilitating easy storage and shipping. The spring complies with industry standards for mechanical extension springs, and its best‑seller rank of #24 in the Mechanical Extension Springs category underscores its popularity among professionals and hobbyists alike. Customer reviews consistently award a perfect five‑star rating, confirming satisfaction with quality, fit, and performance. The inclusion of a detailed specification sheet with each order helps users verify dimensions and load limits before integration into their projects.

Designed with versatility in mind, the 9669 spring integrates seamlessly into a wide range of devices, from household appliances like washing machines and coffee makers to automotive components, marine equipment, power tools, and even educational toys. Its single‑loop design allows quick connection to pins, brackets, or shafts without the need for additional hardware, saving time during assembly or maintenance. Whether used to provide a gentle return force in a latch, to absorb shock in a vibration‑prone system, or to maintain tension in a cable assembly, this spring delivers consistent performance across diverse environments.

Each batch of 9669 springs undergoes a comprehensive quality‑control protocol that includes dimensional verification, load testing to the 6.7 lb rating, and surface‑finish inspection. The springs are certified to meet relevant ANSI and IEC standards for mechanical extension components, ensuring they perform consistently across global markets. Documentation accompanying the product includes a full specification sheet, material certification, and a traceable batch number, providing engineers with the data needed for compliance and safety audits.

Real‑world deployments of the 9669 spring include its use in automatic door closers for office cabinets, as a tensioning element in 3‑D printer filament guides, and as a shock absorber in handheld power tools. In each case, the spring’s predictable force curve and durable construction contribute to smoother operation and longer component life. By selecting a spring that combines precise dimensions with a robust finish, manufacturers can reduce the frequency of part replacements and improve overall system reliability.

Usage

In a typical home appliance scenario, the 9669 spring can be employed to restore the position of a door latch after each use, ensuring a smooth closing action without manual effort. The spring’s modest load capacity is perfect for lightweight doors, while its corrosion‑resistant finish protects against humidity inside washing machines or dishwashers. Installation requires only a small opening on the moving part, where the single loop can be slipped over a shaft or pin, eliminating the need for tools or fasteners.

For automotive applications, the spring serves as a reliable component in fuel pump assemblies, throttle linkages, or seat belt retractors where a controlled return force is essential. Its compact size fits within tight engine bays, and the nickel plating guards against exposure to oil, coolant, and road salt. Mechanics appreciate the ease of replacement: the spring can be removed and installed in seconds, reducing vehicle downtime and labor costs.

In the realm of hobbyist projects and educational kits, the 9669 spring offers a hands‑on example of energy storage and release. Builders of model boats, RC vehicles, or mechanical toys can use the spring to power moving parts, such as propeller shafts or gear mechanisms, providing a realistic feel and functional durability. The spring’s predictable behavior also makes it an excellent teaching tool for physics demonstrations involving Hooke’s law and elastic potential energy.

In industrial settings such as conveyor systems, packaging machines, and robotic arms, the 9669 spring can be employed to provide a gentle return force that prevents over‑travel and reduces wear on moving parts. Its compact profile allows integration into confined mechanical housings, while the corrosion‑resistant finish extends service intervals even in environments with high humidity or exposure to lubricants. Maintenance crews appreciate the spring’s quick‑release design, which enables rapid adjustments during routine equipment servicing.

Why Choose Us

YRZHKS stands for quality and reliability in the spring manufacturing industry. Each 9669 spring undergoes a rigorous heat‑treatment process that tempers the steel to a precise hardness, ensuring that the spring retains its elasticity over extended service life. The nickel‑plated coating is applied in a controlled environment to achieve uniform thickness, delivering superior resistance to rust, abrasion, and chemical exposure.

Our quality assurance program includes dimensional inspection, load testing, and surface finish verification for every batch. By adhering to ISO‑9001 standards, we guarantee that every spring meets the exact specifications listed in the product data sheet, providing confidence to engineers, technicians, and DIY enthusiasts alike. The consistency of our manufacturing process reduces variability, so you can rely on the spring’s performance in critical applications.

Beyond the product itself, YRZHKS offers responsive after‑sales support. Our dedicated customer service team is available to answer technical questions, provide installation guidance, and address any concerns that may arise after purchase. With a commitment to continuous improvement, we welcome feedback and strive to enhance the user experience with each new release.

YRZHKS is committed to environmentally responsible manufacturing. The spring steel is sourced from suppliers that adhere to sustainable mining practices, and the nickel‑plating process utilizes low‑toxicity chemicals and recirculates waste water to minimize environmental impact. Our production facilities operate under energy‑efficient protocols, and we continuously seek ways to reduce material waste. By choosing YRZHKS, customers not only receive a high‑performance component but also support a supply chain that prioritizes ecological stewardship.

Key Features

• Compact 4‑inch length with 9/16‑inch OD fits into tight spaces while delivering reliable extension force.
• Single‑loop open end enables tool‑free installation, saving time and reducing assembly complexity.
• Tempered spring steel construction offers high fatigue resistance, ensuring long‑term performance under repeated compression.
• Nickel‑plated finish provides corrosion resistance for indoor and outdoor use, extending product lifespan.
• Pack of four springs includes dedicated after‑sales support, guaranteeing assistance and replacement if needed.

FAQ

What is the maximum load this spring can support?

The 9669 spring is rated for a maximum safe load of 6.7 lb, which is suitable for light‑weight clamping, cushioning, and reset mechanisms in many applications.

How do I install the single‑loop spring?

Simply slide the open loop over the designated pin or shaft until it rests securely; no tools or additional hardware are required. Ensure the spring is oriented correctly to provide the intended force direction.

Is the spring suitable for outdoor or marine environments?

Yes. The nickel‑plated coating protects the spring steel from moisture, salt, and mild chemicals, making it appropriate for marine equipment, outdoor tools, and other exposed applications.

What warranty or support does YRZHKS provide?

YRZHKS offers a one‑year limited warranty covering manufacturing defects, and our customer service team is ready to assist with technical questions, installation help, or replacement requests.

Can this spring be used as a replacement for other 9/16‑inch OD extension springs?

The 9669 spring matches the 9/16‑inch outer diameter and 4‑inch length of many standard extension springs, but its single‑loop design and specific load rating may differ from other models. Verify the required load capacity and attachment method before substituting to ensure optimal performance.