Posted by Clint Dixon [162.158.74.246] on Tuesday, February 19, 2019 at 19:38:37 :
In Reply to: Have some numbers for you posted by Clint Dixon [172.68.58.14] on Tuesday, February 19, 2019 at 19:34:36 :
Thread lengths vary from 2.25 to 3 inches long. All widths are from inside of leg to inside of leg - 1.8125 inches. All lengths are measured from the underside flat of the saddle to the ends of the legs:
'47 WDX rear U-bolts - 9 inches long
'51 B3PW rear U-bolts - 9.25 inches long
'47 WDX front driver side U-bolts - 8 inches long
'51 B3PW front driver side U-bolts - 7.50 inches long
'47 WDX front passenger side U-bolts - 8.25 inches long
'51 B3PW front passenger side U-bolts - 8.25 inches long
All U-bolts have cut threads. The non-threaded portions of the shanks measure from .560 to .566 in diameter. The thread major diameters measure from .554 to .558 diameter.
I have an original NOS overload kit (uninstalled), also with 9/16-18 threaded U-bolts. They have rolled threads. The widths between the legs measure the same - 1.8125 inches. However the non-threaded shank portions measure .525 diameter. The thread major diameters are right at .558 inches.
The parts lists are not much help. They indicate several changes over the years. My '47 and '51 have vastly different springs with different rates, however the U-bolts vary only slightly in length. It appears the parts lists also measure the overall length instead of from bottom flat on saddle.
Sorry, I do not know how the text in my earlier post got rearranged.
Junior
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