What is ISO 10243 - Compression springs with rectangular section about?
ISO 10243 establishes the technical specifications for compression springs made from rectangular wires. The parameters set in ISO 10243 are applicable to springs which are classified into spring rates: light, medium, strong and extra strong. For each spring rate, ISO 10243 gives a colour code.
Note-
ISO 10243 does not attempt to specify the quality of the springs themselves, nor all of their dimensions (e.g., cross-section), their material or their length of life.
Who is ISO 10243 - Compression springs with rectangular section for?
ISO 10243 on tools for pressing — compression springs with rectangular section — housing dimensions and colour coding is applicable to:
- Spring manufacturers
- Rectangular wire manufacturers
Why should you use ISO 15871 - Compression springs with rectangular section?
Springs made from rectangular wire are stronger than springs made from regular wire. ISO 10243 lays out technical specifications for compression springs made from rectangular wire which can be used you to improve the quality of the springs.
What’s changed since the last update?
BS ISO 10243:2019 is the third edition that cancels and replaces the second edition (ISO 10243:2010), which has been technically revised. BS ISO 10243:2019 also incorporates the Amendment ISO 10243:2010/Amd 1:2011.
The main changes compared to the previous edition are as follows:
- Some values of spring rate have been modified in Table 2 to Table 5
- A column giving the force at maximum operating deflection has been added in Table 2 to Table 5

