PART NO.  SPL.PAGE  DESCRIPTION                                                           
AHH5805   TC.D.2    Stud -pump to bracket (2) -(pump mounting, fuel system, Twin Cam)

AHH5805 Stud is item 43 below. The special drawing number is required for the odd cmbination of threads. The base end that screws into the fuel pump body has British Standard Fine (a Whitworth based thread), while the exposed end for the lockwasher and nut has Unified National Fine thread.

Length=1-1/4"
Top end thread = 5/16-24-UNF x 5/8"
Bottom end thread=5/16-22-BSF x 15/32"