Spot weld callout

A spot weld callout identifies a series of discrete weld nuggets in overlapping sheet metal. The size indicates the spot diameter and the pitch states their spacing along the seam. A process note in the tail can make clear that resistance spot welding is intended. Use this compact notation for enclosures, brackets, and other sheet-metal assemblies that are joined at regular intervals. Before using the layout in a build or document, compare every label with the source requirements and update the drawing when parts, conditions, or materials change. The example is deliberately small so the essential relationships remain readable, easy to review with collaborators, and ready to extend with the details required for the actual project.