Double-End Threaded Stud, Material Steel, Material Grade/Class Class 8, Finish Black Oxide, Overall Length 50 mm, System of Measurement Metric, Thread Length A 15 mm, Thread Length B 30 mm, Thread Size A M12-1.75, Thread Size B M12-1.75, Dimensional Standards DIN 939, Rockwell Hardness C22 to C32, Package Quantity 100