air filters

Note that for some pin counts, there are DIN connectors with the pins positioned differently. I'm not sure whether these are really part of the DIN standard. For instance, there are at least three different pin arrangements for 5-pin DIN connectors. One has all five pins spaced around a 180 degree arc. One has a 240 degree arc. And one has four pins evenly spaced around the full circle, with a fifth pin in the center. Similar variations exist in the 7-pin connectors. I think the 240-degree 5-pin plug can be mated with a 6-pin DIN socket, but I have not verified that. Some things sold as circular DIN connectors are compliant with the DIN standard, some with an IEC standard, and some with neither. A few minutes searching with Google did not reveal the designations of the actual DIN and IEC standards, though I don't want to buy them in any case.