I need a nut…

Discussion in 'Maintenance Bay' started by Sluggo63, Nov 1, 2021.

  1. Sluggo63

    Sluggo63 Pattern Altitude

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    Sometime over the last however long, the retaining nut (locking nut?) for my PTT switch must have come loose and backed out and disappeared. I was able to cannibalize one from the other control wheel so I can use the switch without it burying itself in the yoke. I need to find a replacement somewhere. Any ideas? It’s about 1/4 diameter.

    208C2B54-CF2B-459F-9FD4-C965E33A3F37.jpeg
     
  2. luvflyin

    luvflyin Touchdown! Greaser!

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    Just about any ol’ hardware store?
     
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  3. eman1200

    eman1200 Touchdown! Greaser! PoA Supporter

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    Bro do you even lift
    Ooohh, where to go with this one, hhmmmm
     
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  4. bflynn

    bflynn Final Approach

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    A nut...well, you're in the right place.
     
  5. Initial Fix

    Initial Fix Line Up and Wait PoA Supporter

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    I’ve seen these at my local hardware store. Just take one with you to check the size

    I can’t let the joke go …. Now I know what the lose nut between the stick and throttle is ;)
     
  6. Sluggo63

    Sluggo63 Pattern Altitude

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    Ok. I’ll have to go more local then. I hit up Home Depot (it was late and they were still open) and no luck there. Back in the day, I would have gone to Radio Shack and I bet they would have had them, but that’s no longer an option.

    I’ll try and find a local Ace Hardware or something. The one drawback to living in a big city, it tends to be dominated by the big box chains.
     
  7. skier

    skier Line Up and Wait

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    Mcmaster? they usually get orders to you in 1-2 days.
     
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  8. Sluggo63

    Sluggo63 Pattern Altitude

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    I figured I needed an attention grabber! ;)
     
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  9. Initial Fix

    Initial Fix Line Up and Wait PoA Supporter

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    I also prefer Ace or TrueValue for these types of parts. The staff is usually fantastic in helping too
     
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  10. Bill

    Bill Touchdown! Greaser! PoA Supporter

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    Almond Joy is the one you want. Mounds don't.
     
  11. Hang 4

    Hang 4 Pattern Altitude

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    Mouser might be one other option. You might have to buy a switch and toss it, but you'll get your nut.
     
  12. Timbeck2

    Timbeck2 Final Approach

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  13. PaulS

    PaulS Touchdown! Greaser!

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  14. luvflyin

    luvflyin Touchdown! Greaser!

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    Yeah. The big boxes dont usually have as big a selection as the local hardware stores. Some of those have those drawer things that have like everything.
     
  15. Bell206

    Bell206 Final Approach

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    It may depend on the switch on how easy to find one. The nut usually comes with the switch and can be tough to find at times. If the local routes don't work out go to an electronic supply house for the nut. Or stop by an aircraft salvage yard.
     
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  16. Dan Thomas

    Dan Thomas Final Approach

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    Duh. Local avionics shop.
     
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  17. kep5niner

    kep5niner Pre-takeoff checklist

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    Fastenal is another option.
     
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  18. Gary Ward

    Gary Ward Line Up and Wait

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    Like said it is a unique nut not found at most hardware stores.

    like said you probably need to buy a switch just like it to get the nut you need.
    Good luck
     
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  19. Clip4

    Clip4 Final Approach

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    That’s cheating.
     
  20. Clip4

    Clip4 Final Approach

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  21. rtk11

    rtk11 Pattern Altitude PoA Supporter

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    Potentially car stereo shops (where they had old two-post radios for volume and tuning) - same sized nut, I believe. Otherwise two thumbs up for McMaster Carr
     
  22. Dana

    Dana En-Route

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    "About ¼" doesn't do it, you need to know the exact thread size. Judging from the picture it might be 5/16" or 8mm, but there are fine and coarse thread pitches as well.

    Go to a local hardware store. They probably won't have the nut, but you can try different sizes of bolts and see which one screws easily into it, then you know what size to order. If you get real lucky they might have a cheap switch with the same size nut.
     
  23. Lindberg

    Lindberg Final Approach

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    I'd think home depot would have one in the little white drawers. Maybe not.
     
  24. Gary Ward

    Gary Ward Line Up and Wait

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    IMO it will be metric. Most electric switches are made over seas.
     
  25. Dan Thomas

    Dan Thomas Final Approach

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    They are now. The switches found in the typical GA light airplane weren't, because those airplanes were built when Asian countries were still underdeveloped.

    Like I said, go to the avionics shop. I used to walk from our aircraft shop over to the avionics shop where they had lots of various small hardware. I'd bet that most shops will have a boxful of nuts and washers taken off dead switches. Most technicians hate to be held up by the lack of some weird nut. Looking for an avionics part anywhere else is a big, frustrating waste of time. Do owners go to Wal-Mart or Rock Auto to look for their aircraft engine oil or spark plugs?
     
  26. Doug Reid

    Doug Reid Cleared for Takeoff

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    If there is a local avionics shop near you...they will have one. I know I have one in my parts bin...lots of old switches and miniature jacks here. PM me if you cannot find one.
     
  27. Dana

    Dana En-Route

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    I don't... I go to True Value and Advance Auto Parts.
     
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  28. pburger

    pburger Pre-takeoff checklist

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  29. RussR

    RussR En-Route

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    Funny you'd mention that - I've bought aviation oil (Aeroshell W100 I think) at Sam's Club.

    Maybe not Walmart, but close enough.
     
  30. Dan Thomas

    Dan Thomas Final Approach

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    Yup. But what engine??
     
  31. Dana

    Dana En-Route

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    Ok, I don't buy oil or plugs for the morning there... but I did for the Mosler. And if I switch to Pmags like I've been thinking about, I'll again get spark plugs there. And I did get the new battery for the Hatz at Autozone. Gotta love experimentals... :)
     
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  32. SixPapaCharlie

    SixPapaCharlie May the force be with you

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    Did someone call my name?
     
  33. flyingbrit

    flyingbrit Pre-takeoff checklist

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    Note this nut is an 8-40, i.e. 40 threads per inch, or "extra fine". Most HW stores will have only the coarse 8-32 size, or possibly the fine 8-36. Extra fine threads are typical for panel mount switches and controls. This allows a thin nut while still having a reasonable number of threads.
     
  34. Sluggo63

    Sluggo63 Pattern Altitude

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    So the saga is complete, I think. I went to the hardware store and fit (diameter wise) a #8 bolt, but wouldn't screw on correctly, so I figured that the thread size was off. I thought maybe it could be metric and tried a M4-0.7 bolt and the nut I had taken off the plane fit perfectly to the Home Depot bolt. I bought a M4-0.7 nut, but when I got to the plane, it still didn't fit quite right. So, $0.13 down the drain there.

    I found this on Aircraft Spruce:
    https://www.aircraftspruce.com/catalog/elpages/edmomomentary6.php

    with this schematic:

    [​IMG]

    And it's showing a 8-40 thread. That would make sense since the #8-32 fit, but wouldn't thread correctly.

    I looked far and wide online but couldn't find anyone selling #8-40 nuts, so I ended up buying this switch just for the nut. It should be here in a few days.

    And then I saw this post:

    Ugh. Where were you a few days ago? Your google-fu is much better than mine. I couldn't find one anywhere. Thanks!
     
  35. kshaw

    kshaw Pre-takeoff checklist

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    Check Mouser. They have all kinds of PTT switch hardware.
     
  36. sourdough44

    sourdough44 En-Route

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    I knew a guy once, in his youth he scaled a fence with those spikes sticking up on top. He ended up in the hospital, REALLY needing a new nut. At the risk of TMI, I’ll leave it there.
     
  37. Snowmass

    Snowmass Line Up and Wait

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    Ace is definitely the place. Try both metric and SAE nuts of about that size since it depends where the switch was made. They are cheap.
     
  38. ARTRR

    ARTRR Filing Flight Plan

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    I would also check Grainger.
    Then I probably have a couple in my own inventory.
     
  39. kshaw

    kshaw Pre-takeoff checklist

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