{"id":8820,"date":"2026-09-25T07:50:55","date_gmt":"2026-09-25T05:50:55","guid":{"rendered":"https:\/\/mfinox.com\/iso-3506-and-astm-f593-f594-equivalencies-for-the-u-s-market\/"},"modified":"2026-09-25T09:18:02","modified_gmt":"2026-09-25T07:18:02","slug":"iso-3506-and-astm-f593-f594-equivalencies-for-the-u-s-market","status":"publish","type":"post","link":"https:\/\/mfinox.com\/en\/iso-3506-and-astm-f593-f594-equivalencies-for-the-u-s-market\/","title":{"rendered":"ISO 3506 and ASTM F593\/F594: Equivalencies for the U.S. Market"},"content":{"rendered":" \n

The European drawing says A4-80<\/strong>. The American one says ASTM F593<\/strong>. The buyer asks if they are the same screw, and the quick answer\u2014\u201cyes, more or less\u201d\u2014is the one that leads to disputes during acceptance. <\/p> \n \n

The two standards describe the same item\u2014a stainless steel screw\u2014but they do so using two different approaches<\/strong>. There is no equivalence table that would allow one to be substituted for the other without verification. There is a general correspondence, useful for orientation, and a series of differences that matter when someone inspects the shipment. <\/p> \n \n

Let’s see how both are interpreted, where the correspondence holds up and where it breaks down.<\/p> \n \n

Two Different Approaches<\/h2> \n \n

It is the difference from which everything else stems.<\/p> \n\r\n