• Fastenal average net profit margin for 2023 was 15.61%, a 0.38% decline from 2022.
• Fastenal average net profit margin for 2022 was 15.67%, a 2.49% decline from 2021.
• Fastenal average net profit margin for 2021 was 15.29%, a 1.39% increase from 2020.

Net profit margin can be defined as net Income as a portion of total sales revenue.