Description
Product Overview
The PrimeLine SP 9630 extension spring is engineered for durability and consistent performance across a wide range of mechanical applications. Constructed from high‑grade spring steel that has been tempered for optimal elasticity, the spring is finished with a nickel plating that provides excellent corrosion resistance, allowing it to function reliably in both indoor and outdoor environments. With a 1 inch outside diameter, a 7 inch overall length, and a wire gauge of 0.135 inch, this spring offers a maximum safe load capacity of approximately 69.9 pounds, delivering a maximum deflection of 2.93 inches when fully extended. The double‑loop closed‑end design simplifies installation, ensuring a secure attachment to both fixed and moving components without the need for additional hardware. This makes the SP 9630 an ideal choice for a variety of sectors, including appliance repair, automotive maintenance, marine equipment, hobbyist projects, and industrial tooling.
![[Product front view showing all components]](https://www.narivo.store/wp-content/uploads/2026/07/7c186d755f38479e97b935c1eae57cbf.jpg)
Usage
Designed with versatility in mind, the SP 9630 extension spring can be employed in numerous real‑world scenarios. In household appliances, it provides the necessary tension for door hinges, latch mechanisms, and rotating assemblies, ensuring smooth operation over years of use. Automotive technicians rely on its robust construction for throttle return springs, clutch release mechanisms, and suspension components where consistent force is critical. Marine applications benefit from the spring’s corrosion‑resistant nickel finish, making it suitable for boat hatch latches, deck hardware, and marine engine components that are constantly exposed to salty environments. Additionally, the spring’s compact size and reliable performance make it a favorite among hobbyists building custom tools, toys, and mechanical contraptions, where precise motion control is required. Its ability to handle both static loads and dynamic movements ensures that it can adapt to a broad spectrum of mechanical demands.
Why Choose Us
When selecting an extension spring, quality, reliability, and after‑sales support are paramount. PrimeLine stands behind the SP 9630 with a one‑year warranty that covers manufacturing defects, reflecting confidence in the material selection and production processes. Each spring undergoes rigorous testing to verify load capacity, deflection limits, and corrosion resistance, guaranteeing that the product meets or exceeds industry standards. Our commitment to customer satisfaction extends beyond the point of sale; we provide detailed installation guidance, responsive technical assistance, and a straightforward return policy should any issues arise. By choosing PrimeLine, you benefit from a trusted brand with a long history of supplying high‑performance mechanical components to professionals and DIY enthusiasts alike.
Key Features
- Nickel‑plated steel construction resists rust and extends service life.
- Double‑loop closed ends simplify installation and provide a secure fit.
- High load capacity of 69.9 lb supports demanding mechanical tasks.
- Compact 1 in. diameter and 7 in. length fit tight spaces.
- Comprehensive one‑year warranty and dedicated technical support.
FAQ
What is the maximum load this spring can safely handle?
The SP 9630 is rated for a maximum safe load of approximately 69.9 pounds, providing ample strength for most appliance, automotive, and marine applications.
Can this spring be used outdoors?
Yes. The nickel plating offers excellent corrosion resistance, making the spring suitable for outdoor and marine environments where exposure to moisture and salt is common.
How do I install the double‑loop ends?
The closed‑loop design allows you to thread the spring onto a fixed post or shaft without additional fasteners. Simply align the loops with the mounting points and press until they seat securely.
Is there a warranty on this product?
PrimeLine provides a one‑year warranty covering manufacturing defects. The warranty does not apply to damage caused by misuse, improper installation, or abnormal operating conditions.
What sizes are available for this spring?
The SP 9630 model is specifically sized at 1 inch outside diameter, 7 inch overall length, and a wire gauge of 0.135 inch. Other sizes are available in the PrimeLine catalog if different dimensions are required.





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