RS PRO Steel Extension Spring, 87.7 mm Free Length, 17 mm OD, Piano Wire, 224.7 mm Max Extended Length 751-950

The RS PRO 751-950 Steel Extension Spring is engineered to provide reliable extension and tension in a wide range of mechanical and industrial applications. Made from high-strength carbon steel piano wire, this spring is designed for durability and performance in environments requiring corrosion resistance and high load capacity.

With a free length of 87.7 mm and an outside diameter of 17 mm, the extension spring is ideal for securing large components while allowing them to be pulled apart for controlled distances. Its robust coil design efficiently stores potential energy and returns objects to their original position once tension is released. The spring can be installed easily using hooks or clips attached to the closed loops at each end, offering quick and secure joining of components.

The maximum extended length of 224.7 mm provides flexibility in assemblies and aids in accommodating substantial elongation. The initial tension is rated at 11 N, supporting reliable force delivery in spring-based mechanisms. The precision wire diameter of 1.6 mm ensures consistent mechanical properties, while the spring rate of 0.46 N/mm allows controlled extension and return motion.

The RS PRO 751-950 model meets stringent standards: RoHS for environmental safety, DIN 17223, and BS 1408 CR3 for spring composition and mechanical quality. Its carbon-steel construction resists rust and corrosion, making it suitable for humid, outdoor, or demanding industrial environments such as machinery repair, equipment assembly, or construction. Typical applications include attaching trampoline mats to steel frames, supporting garage doors, or integrating into custom mechanical systems.

Designed for dependable performance and compliance with international standards, this extension spring serves professionals across industrial, laboratory, commercial, and construction operations.

Corrosion-resistant steel construction for longevity. Flexible free length and extended length support various mechanical needs. Controlled tension and spring rate for reliable performance. Easy installation with closed loops for hooks or clips.

Adheres to recognized quality and safety standards. Explore more mechanical fasteners and springs in the RS PRO range on EnvMart.

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