When replacing a 2024 rivet with a 2117 rivet, how do you determine the size to use?

When replacing a 2024 rivet with a 2117 rivet, it is important to choose the correct size rivet to maintain the structural integrity of the assembly.

Selecting the next larger size if the original rivet's diameter is 5/32 inch or smaller is correct due to the differences in strength and properties between the two rivet types. The 2117 rivet is made from a softer alloy compared to the stronger, heat-treated 2024 rivet. If you were to use the same diameter for the 2117 rivet, it might not provide sufficient strength for the application, especially in critical load-bearing scenarios. Therefore, increasing the diameter helps compensate for the differences in material properties, ensuring that the fastened joint remains strong and reliable.

In summary, by opting for a larger size, you account for the differences in material strengths and ensure that the riveted joint achieves the necessary performance characteristics. This practice is critical in aeronautical applications where structural integrity is paramount.