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Thread: NHS Lug Bolts

  1. #1
    Supporting Member hemmjo's Avatar
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    Feb 2017
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    hemmjo's Tools

    NHS Lug Bolts

    I stumbled onto some free tires and wheels for one of my lawn tractors. They have agricultural lug tread which is not good for mowing lawns, but good for a keeping walking paths in my woods clear. It will be nice to be able to quickly swap between turf tires and lugged tires. I got these because they were damaged. (That is how I get most of my stuff) Rather that try to repair the wheels, I made new lug bolts to secure these wheels.

    NHS Lug Bolts-damaged-wheel.png
    Click to enlarge

    Yard tractor lug bolts are typically 7/16-20 with small 5/8 hex heads.(or some metric size) The holes in the wheels are damaged. They may have been for 1/2 lugs to begin, but they are larger now and not round. It appears they have been run loose which has enlarged the holes so much the tapered bolts contact the hub before tightening against the wheel

    These custom lug bolt adapters are Not for Highway Service (NHS). Cone or tapered seat lug nuts are most commonly at a 30˚, 60˚ included. Some applications use a 45˚, 90˚included angle. *

    I choose 45˚ for these adapters since the original holes are not tapered properly anymore and the 45˚ angle presents a wider surface to hold the damaged holes in place.

    I had some 7/8 hex bar stock remaining from a previous project.

    NHS Lug Bolts-lug-bolts.png
    Click to enlarge

    Procedure I used;

    Chuck full length stock, extend as required.
    1) Drill 25/64, 5/8 deep
    2) Cut Taper 45˚
    3) Tap 7/16-20 to depth
    4) Cut off 1/2+ length (complete to this step for number required) I just use my portable-bandsaw.
    Chuck tool to hold small threaded parts.
    5) Face and chamfer front side of all
    6) Trim tapered side to final length.
    7) Clean cutting oil residue from adapters and bolts with Acetone
    8) Assemble bolts and adapters with Red Loc-Tite

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  2. The Following User Says Thank You to hemmjo For This Useful Post:

    Jon (May 15, 2023)

  3. #2
    Content Editor
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    Aug 2013
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    Thanks hemmjo! We've added your Lug Bolts to our Wheel and Tire category,
    as well as to your builder page: hemmjo's Homemade Tools. Your receipt:

    2000 Tool Plans

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