CN-2 BODY PANEL CONSTRUCTION STANDARD BODY MARKS Center Mark (5φ) Center Mark Assembly Mark Center Mark 18φ Assembly Mark 18φ 10φ —— 10φ Assembly Mark 10φ 13φ Assembly Mark 22φ 18φ Assembly Mark mm in. 5 0.20 10 0.39 13 0.51 18 0.71 22 0.86