Similar to DIN eighty four, but with a bigger head diameter and a rather different head profile. Manufactured to ISO 1580 or DIN eighty five. Please Be aware that due to producing limits, all nylon variants of these items are only "just like" rather than "in absolute accordance with" the https://daltonjvewi.bloguetechno.com/getting-my-wood-screws-to-work-65809356