Comparing ISO 4014/4017 to DIN 931/933


DIN 933 and DIN 931 are both hex head cap screws with a coarse thread pitch, but DIN 933 is fully threaded, while DIN 931 is only partially threaded. Similarly, ISO 4017 and ISO 4014 are hex head cap screws with a coarse thread pitch, with ISO 4017 being fully threaded and ISO 4014 partially threaded.

Key Differences: DIN 933 vs. ISO 4017

Criteria DIN 933 ISO 4017
Size Range Available in sizes from M1.6 to M52 Available in sizes from M1.6 to M64, offering a broader range of sizes
M10 WAF is 17mm WAF is 16mm
M12 WAF is 19mm WAF is 18mm
M14 WAF is 22mm WAF is 21mm
M22 WAF is 32mm WAF is 34mm

Choosing the Right Standard

  • Thread Type: Determine if you need a fully threaded bolt (DIN 933/ISO 4017) or a partially threaded one (DIN 931/ISO 4014).
  • Size Requirements: Consider if you need sizes beyond M52, in which case ISO 4017 is preferable.
  • WAF Differences: Be aware of the slight variations in WAF at specific sizes, which could impact compatibility with existing tools or components.

By understanding these distinctions, you can select the appropriate bolt for your needs, ensuring compatibility and optimal performance in your projects.

All information is strictly informative