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Technical LH thread wheel nuts

Discussion in 'The Hokey Ass Message Board' started by keith27T, May 29, 2020.

  1. BamaMav
    Joined: Jun 19, 2011
    Posts: 4,737

    from Berry, AL

    The only semi truck lugs that were left hand were for the old style nut located wheels. They used a inner nut on duals that was threaded on the outside as well, and a normal looking nut on the outside wheel, left threaded on the left side of the truck. The inner nut secured the inner wheel, then you put on the outer wheel, and the normal looking nut secured the outer wheel. I've had the studs break off and actually used the inner and outer nuts in that spot so you couldn't tell the stud was broken! The inner nut was a square head while the outer nut was a normal hex head.

    Modern wheels on semi's are are hub piloted, so you only use one nut, the wheel faces sit on one another where the old two piece nut wheels rode on the cones on the nuts.
    Truckdoctor Andy likes this.
  2. Check "Chevys of the 40's" in So Cal they should have what you need.

    Chevs of the 40's | 1937-1954 Chevrolet Classic ...
    Chevs of the 40's | 1937-1954 Chevrolet Classic Restoration and Street Rod Parts Parts for 1937 to 1954 Chevy Cars or Trucks (Click on your car/truck below for vehicle information) 1937 Car + Model INFO. All 1937 Chevy Car Parts were either a Master or Deluxe Master model in a Sedan, Coupe, Coach or Cabriolet body style. The Cabriolet had a ...
  3. 49ratfink
    Joined: Feb 8, 2004
    Posts: 18,032

    from California

    good idea, wait until they all snap off while going down the road like they did on my old 56 Chevy. then you can fix all sorts of broken things all at once. LOL
    Joined: Apr 26, 2020
    Posts: 9


    I need a set for my 56 Willys Wagon and Sumitt had them
  5. 66gmc
    Joined: Dec 4, 2005
    Posts: 580


    I had a 35 chevy 1/2 ton with Lh threads, but my 35 chevy sedan, and 36 1/2 ton have Rh threads, all were built in Canada at the same plant.
    squirrel and Penetrator like this.
  6. patsurf
    Joined: Jan 18, 2018
    Posts: 449


    this is truly getting confusing!!
  7. 66gmc
    Joined: Dec 4, 2005
    Posts: 580


    I think a lot of Canadian built vehicles were put together with whatever hardware they had laying around at the time, or at some point in the past 80-90 years a disgruntled mechanic thought it would be fun to switch out the studs...
  8. jroberts
    Joined: Oct 14, 2008
    Posts: 1,638


    Studebaker used the left hand studs as well. I think they did so at least through 1959. I had a '59 Lark that had them. I think a lot of folks changed them to right hand studs so everything is the same.
  9. 1-SHOT
    Joined: Sep 23, 2014
    Posts: 2,132


    Buicks had left hand BOLTS
    1934coupe, egads and tb33anda3rd like this.
  10. dwollam
    Joined: Oct 22, 2012
    Posts: 1,274


    Mopars had left hand nuts on the left, drivers side and right on the right, passenger side. Go out in my front yard and check 15 or 20 Dodge Brothers and Mopar cars. Exception is all 3 of the '36 Dodge 1/2 ton LC pickups I own/owned, they were all right hand bolts.

    Last edited: Jun 1, 2020
    57 Fargo likes this.
  11. one thing to keep in mind; impact guns have more torque in the "left hand" rotation. if tightening them up with a gun the "feel" of tightness will be different. use a torque wrench.
    scrap metal 48 likes this.
  12. 2OLD2FAST
    Joined: Feb 3, 2010
    Posts: 3,169

    from illinois

    Thats the first time I've ever heard that claim ?
  13. 1934coupe
    Joined: Feb 22, 2007
    Posts: 4,369


    So did Oldsmobile.

  14. scrap metal 48 likes this.
  15. I think they’re all like that. I’ve had a few brands and they all list higher torque ratings in “reverse”.

    Sent from my iPhone using H.A.M.B.
  16. Well...after reading through this, pretty sure I at minimum got a reminder to look for the “L” on the end of any left side studs I can’t get the nut loose on. It has been several years since I took wheels off anything with LH threads, so appreciated. And, I also had never heard of a Chevrolet with LH threads, but had heard (and seen some) of the others. Good info! Thanks!
  17. Yes the dorman 611-015 is the right one for this application. Napa has them.
    Picked up 1 to check out and it fits. So tomorrow I am going to get the other 9 they have. 2 short, but will ask if he can get more in. $1.76 each Canadian.....Thanks again. Lordco here is special order.
  18. Good to hear!

    Sent from my iPhone using H.A.M.B.
  19. hotrodjack33
    Joined: Aug 19, 2019
    Posts: 2,099


    That LH/RH self tightening theory is really true. All center "knock off" wheels have LH & RH threads for that very reason...self tightening. Bought a set of used 40 spoke knock-off wheels for the wife's Panel. Of course, I initially put them on the wrong sides...less than a mile one wheel loosened up and screwed up the threads on the adapter. Switched sides and never had another problem.
    clem and keith27T like this.
  20. Glad you found what you needed. I’m in BC too and got my dorman LH nuts from Bumper to bumper.
    Last edited: Jun 4, 2020
    keith27T likes this.
  21. oddball62
    Joined: Dec 3, 2011
    Posts: 12

    from Arizona

    My all original 56 Oldsmobile 88 had left hand threads on one side. They were factory. I ended up changing all over to right hand thread.
  22. Ardun 32
    Joined: Feb 9, 2009
    Posts: 18

    Ardun 32

    Rule of thumb "right is wrong". the LH threads go on the right side
    hotrodjack33 likes this.

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