This is an OEM original with 3/8"-16 threads. Overall length according to the MPC is 9 inches, with 3-1/4 inches being threaded but we have found almost without fail, the actual length is 8" with 3 1/4" of threads.
We also carry the OEM hold down wing nut or spinner nut Mercury Cougar part number B9AZ-1462-A. Additionally, look for the wheel centering plate or disc, part number C5ZZ-1424-A.
Item for sale in this section is only the J-bolt.