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(Topic ID: 266197)

Flush headed machine screw????


By PinHigh1

6 months ago



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  • 10 posts
  • 5 Pinsiders participating
  • Latest reply 6 months ago by PinHigh1
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    #1 6 months ago

    I snapped off the threaded bolt while tightening the nut on a coil stop on drop target mech. Problem is there is little room on the other side for a head so looking to find a flush or near flush thin headed to use. Any ideas? The original came factory welded to the mech bracket and is virtually flush.

    20200410_210631 (resized).jpg
    #3 6 months ago

    No, that's too thick. What I need must have a razor thin head otherwise the drop target will hit it. I found this at Marco-https://www.marcospecialties.com/pinball-parts/20-9468

    Looks like what I need. Never heard of a PEM stud. Anyone know what that is intended to be used for?

    #5 6 months ago

    Yea I looked it up too. Apparently requires a press to set it into the metal. But I'm thinking I could hammer one in or once I start tightening the nut it will squeeze in tight.

    #6 6 months ago

    PEM Studs:

    https://www.pemnet.com/fastening-products/pem-self-clinching-fasteners-new/

    They are press fitted into a hole.

    You could try spot welding a flat head screw and gring off the excess where necessary.

    #7 6 months ago

    Maybe this style screw?

    amazon.com link »

    #8 6 months ago

    So I now have learned what the official name of this style bolt/stud - press in ground stud/bolt. PEM is the brand name. They require expensive presses to press into the metal. Has anyone hammered one of these in before?

    #9 6 months ago

    I would try and hammer it in with a flat punch.

    #10 6 months ago

    I found these aluminum flat head screws in the screen door hardware section. Flat enough to avoid catching the drop target movement. And while not as strong as a steel bolt, should do the trick with lock washer and nut.
    20200411_124849 (resized).jpg

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