Kit #7FA – Reduced shank British 5/16″ x 26 tpi chromoly studs for STOCK IRON CYLINDERS WITH FULL AUTO HEAD. SS nuts and extra washers.

Full Auto heads have .1″ less aluminum spacing between the head surface and the 5/16″ stud hole compared to stock heads. To keep the nuts from running out of threads you must use an extra washer on each stud as provided or the nuts will not tighten down on the head.
The triangular shape allows a reduced shank while still locating the head on the cylinders. SS nuts and Belleville spring washers included.