420 Lug Bolts?

duncwarw

Member

1957 420U.

I have never been able to find the "proper" square-headed bolts and using hardened regular bolts presents a problem.

The bolt heads sit in the square recesses making them pretty much impossible to get any tool on them.
As a result, the nuts can"t be tightened.

I tried filling the bolt head gaps by welding, but that usually doesn"t solve the problem.

I can get lucky sometimes by tightening the nuts with an impact wrench by simply spinning them fast enough to get some grab.

In the end, whenever I have to remove a back wheel, I have to grind the nuts off and buy new bolts.

In the meantime, the nuts (being a little loose) wobble around and eat the rims causing the need for me to weld washers on the outside of the wheels to provide an actual round hole for the bolts to come through.

Since I"m not the original owner of this machine, I don"t know what the "real" lug bolts should be.

Carriage bolts?

The 420 has some impressive torque...
 
I 'Think' there is an outfit called "Correct Connections" that has what you want. I have not been successful with any replies from them. Luck. HTH
 
Thank you both!

Since I'm not the original owner, I have no way of knowing if the bolts it had when I bought it were even the correct ones.

I would assume they are hardened?
If not, carriage bolts from the local hardware store would be tempting.

This is my first real tractor so I don't have anything other than rentals to compare it to but that old 420 seems to have massive torque (especially at near-stalling revs).

I want it to have the right bolts but they seem hard to find and at $40 apiece?....
 
Give me a call @ 573 535 8952. I have a few extra bolts available . Are you wanting the spacers and nuts also. Thanks , Tom Ziegler
 

NAPA?

I can get hardened bolts (I think they"re 9/16s) but the problem I have is the heads get recessed into a square hole at the inside of the hub and I have no way to stop them from spinning when tightening.

I think I"m on my third set.
 

Thanks Tom, I'll be in touch once I split this tractor.

Do you (or anyone) know of a decent online parts diagram? I didn't even know there were spacers!
 

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