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Thread: locking nuts for upper control arms

  1. #1
    It's all about the Benjamin! monterey1962's Avatar
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    Default locking nuts for upper control arms

    I plan on replacing the front control arm bushings on my '89 CV LX. Does anyone have a set of the locking nuts needed for the upper control arms? As I seem to have read, the originals are not re-usable.
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  2. #2
    P31 Pursuit Car Brown_Muscle's Avatar
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    I have a few, but to be honest you’d probably do just as well ordering them from where I did: https://www.grainger.com/product/FAB...ock-Nut-29DU72
    -Phil



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  3. #3
    P31 Pursuit Car Brown_Muscle's Avatar
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    I torqued them to spec and one actually came loose...so I'd use the locking nuts AND lock tite...
    -Phil



    +1982 Ford LTD-S Police Car. Built 351w, Trickflow 11R 190 Heads, Edelbrock 1906 Carb+ RPM Intake, WR-AOD, Full exhaust headers to tails. 3.27 Trac-Lok Rear. Aluminum Police Driveshaft. Speedway Springs+Bilstein Shocks, Intermediate Brakes.

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  4. #4
    Beater gonna beat sly's Avatar
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    I ended up using some jam nuts on a couple of the pinch nuts I got because they wouldn't hold.

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  5. #5
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    Um.... isnt that a metric thread? M16x1.5 is dang close to 5/8-18 like within .005" on both diameter and pitch.

  6. #6
    I'm an air-conditioned gypsy gadget73's Avatar
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    Would make sense for it to be metric, all of the other body and suspension hardware is. Wasn't something I considered at the time, the sticky on here I think specifies 5/8 fine.

    McMaster-Carr is my usual go-to for hardware. Also just seems to be better quality than the stuff I get from Grainger at work.

    I think I'm using 5/8 hardware on mine, McMaster sourced, and it hasn't come loose in the almost 15 years its been on there. When I re-used the original nuts they came loose almost immediately.

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  7. #7
    It's all about the Benjamin! monterey1962's Avatar
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    Thanks for the info, fellas.

    I went ahead and ordered nuts from McMaster-Carr. Ordered body mount bolts, too.
    Three's company. Six is a fleet.

    1978 F-150 Custom
    1989 Crown Victoria LX
    1995 F-150 XLT
    1998 Crown Victoria LX
    2004 Crown Victoria LX Sport
    2011 Mustang GT

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