The invention relates to an attachment pin (1) for fixing an exhaust-gas
muffler (2) in an apparatus part (4) of a portable handheld work
apparatus (5) driven by an internal combustion engine. The exhaust-gas
muffler (2) includes especially an exhaust-gas catalytic converter (3).
An at least partially exposed region (6) is provided with a cooling
surface (7) and is on the attachment pin (1) between the exhaust-gas
muffler (2) and the apparatus part (4).