How is the diameter of a rivet indicated in its part number?

In aviation and aerospace contexts, the part numbering system often follows specific standards to convey vital information about the components. A rivet's part number typically includes a structured format that identifies various characteristics, including the diameter.

In the part number MS20426AD, the numbers following the 'MS' prefix provide key details. Specifically, the sequence '20426' indicates the size and type of rivet, with the diameter being specified within those digits. For instance, the '204' section may directly relate to the diameter measurement in an established unit, typically in increments of 1/32 of an inch. This means that the digits in this range help identify the rivet size, with non-numeric suffixes differentiating the variations in head design, material, and other attributes.

Understanding how this part number systematically conveys the rivet diameter allows engineers and technicians to select the proper rivet for assembly, ensuring performance and structural integrity in aerospace applications.