It's the service mark of NSF International, an organization that sets safety standards for cookware (among other things). NSF originally stood for “National Sanitation Foundation”. read more
NSF originally stood for “National Sanitation Foundation”. Many health codes require the use of NSF-certified cookware for commercial cooking, in much the same way that many insurers and building codes require UL-listed electrical equipment. read more
The heat ring on the bottom is pretty indicative of the manufacturer, too. Lodge, for example, will have 3 evenly spaced notches in the heat ring. SK is pretty standard for skillet. read more
The Meaning of NSF and UL When discussing restaurant equipment and supplies, NSF and UL are frequently mentioned. Briefly, let's discuss what these two organizations do and what their certifications mean. read more