I need to buy 20 M10x50mm allen caps with a thread of 30mm and the other 20mm nearest the head to be solid shank. Grade 12.9

Unfortunately, all the places I have googled are only selling fully threaded items

These need to be solid and threaded as they are for securing the driveshafts to the ouput flanges on the BMW - the bolts I removed are those silly E12 headed types that canot be reused and BMW want a fortune for them


So, best place to buy online please