https://www.amazon.com/s/?ie=UTF8&keywords=metric+socket+head+screws https://www.amazon.com/s/?ie=UTF8&keywords=metric+socket+hea... Someone mentioned M* screw

https://www.amazon.com/s/?ie=UTF8&keywords=metric+socket+head+screws https://www.amazon.com/s/?ie=UTF8&keywords=metric+socket+hea... Someone mentioned M* screws and that got me searching to find out what it is and then ended up on the above amazon page. So I like the indexing scheme there and question OP that it can't be done by image and machine learning. Basically, all those indexes [minus material which you can just select] should be trivially recognizable and that just leaves the precision measures.