SOLD BY THE EACH. If you need a set be sure and put "4" in the box.
5/16-18 x 4.41" Over All Length or 4.10" long threaded end. Hex Head Grade 8 BLACK.
Bolt Part number # 792093
These work great if you want to add a disc brake and a thick #40 sprocket.
It's about .20" longer then the standard bolt length.
These are custom made as the shoulder and the threads have to be machined to fit the width of the hub of the differential.