M12, LONG, Hex Sets/Bolts, Fully Threaded, STAINLESS STEEL, Metric.

M12, LONG, Hex Sets/Bolts, Fully Threaded, STAINLESS STEEL, Metric.
 
Thread Size = 12mm
Head/Spanner Size = 19mm
 
You can also add on Nuts, Nylocs & Washers from the drop down box.
 
Note: They are measured from underneath the head, so length is the total thread length not including the head.