Step-by-step tool to determine the minimum rivet diameter and required rivet length for sheet metal repairs. Supports both inches and millimeters. Used by aircraft mechanics for structural repairs and modifications.
- Minimum rivet diameter = 3 × thickness of the thickest plate.
- Required rivet length = total clamping thickness + 1.5 × rivet diameter.
- Toggle between inches and millimeters for convenience.
| Material | Spacing Rule | Edge Distance Rule |
|---|---|---|
| Aluminum | 4 x Rivet Diameter | 2 x Rivet Diameter |
| Steel | 4.5 x Rivet Diameter | 2.5 x Rivet Diameter |
| Composite | 5 x Rivet Diameter | 3 x Rivet Diameter |
Source: FAA AC 43.13-1B, Aircraft Structural Repair Manual.