Stainless exhaust part stamped 17221 with welded seam bead

Extreme close-up of a polished stainless exhaust component stamped with the part number 17221, showing the rolled seam and a TIG-welded bead along the lower flange. A partial white label is visible at lower right against a textured stucco wall background.

AI caption March 2012 · Photo 58 of 363