Major component of the type IV (TAP) pilus (PubMed:10858220). Aeromonas hydrophila possesses two distinct families of type IV pili: the bundle-forming pilus (Bfp) and the type IV pilus (Tap) (PubMed:9344785). Mutants have no effect on the bacterial adherence to host epithelial and intestinal cell lines. Belongs to the N-Me-Phe pilin family.