Hexagon nut
<img src="https://eng-calculations.com/SVG/ISO/ISO_8673/Hexagon nut.svg" alt="Hexagon_nut" title="Hexagon_nut">
https://eng-calculations.com/SVG/ISO/ISO_8673/Hexagon nut.svg
<img src="https://eng-calculations.com/SVG/ISO/ISO_8673/Hexagon nut.svg" alt="Hexagon_nut" title="Hexagon_nut">
https://eng-calculations.com/SVG/ISO/ISO_8673/Hexagon nut.svg