THIS IS A STOCK NUT TO GO ON THE DRIVE SHAFT IF YOU ARE NOT RUNNING A COMPENSATOR SPROCKET OR YOU HAVE FITTED A BELT DRIVE SYSTEM IT HAS A 7/8 inch  HOLE WITH 14 TPI THREAD count AND FITS ALL BIG TWIN 1955 UPTO 1990 {may fit later than 1990 big twin   PAN,SHOVEL,EVOLUTION BIG TWIN   AND IS A HARDENED STEEL PART, TOP QUALITY MADE IN THE USA HD PART NUMBER 24003-55   METAL COLOUR MAY VARY, BUT THEY ARE NEW SHELF STOCK 

WORLDWIDE DELIVERY OF OVER 40 TONS OF NEW AND USED PARTS