Need dimension for Svea Penta Screw tool

Discussion in 'Fettling Forum' started by TSPORT, Jan 14, 2023.

  1. TSPORT United States

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    Hi. Does anyone have a proper penta screw tool that fits the Svea 123 fuel cap and can tell me the measurement from one of the flats to the opposing peak in millimeters? I can roughly measure the hole in the cap with my caliper but want a more precise measurement from an actual tool that is known to fit.
    Thank you in advance.
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  2. nagant

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  3. presscall

    presscall United Kingdom PotY Winner SotM Winner SotY Winner Subscriber

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    In THIS thread there was some discussion and I replied
    I’d ground a pentagon profile out of an Allen key/hexagon wrench.

    9651A46C-1C45-4F44-A2CD-3819052F6796.jpeg F829F25C-E784-4671-82E1-31FFE194F8C7.jpeg


    It’s been used a lot over the years, here in the site photo.

    18A3582A-922B-4C45-957A-046954E71579.jpeg

    John
     
  4. snwcmpr

    snwcmpr SotM Winner Subscriber

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  5. snwcmpr

    snwcmpr SotM Winner Subscriber

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  6. presscall

    presscall United Kingdom PotY Winner SotM Winner SotY Winner Subscriber

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    Thanks Ken. 0.145 inches, or 3.6 mm.
     
  7. snwcmpr

    snwcmpr SotM Winner Subscriber

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    Note, it is tapered.
     
  8. presscall

    presscall United Kingdom PotY Winner SotM Winner SotY Winner Subscriber

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    Yeah, so’s mine, the slightest of tapers so it enters the slot about 4mm then tightens up.
     
    Last edited by a moderator: Jan 14, 2023
  9. TSPORT United States

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    This was just what I was looking for (0.145 inches, or 3.6 mm), thanks all for your replies. I had modified a hex wrench (one of those cheapy Ikea furniture assembly wrenches) into a pentagon shape previously and it got the job done but I was pondering ordering up the bit below from Peerless but it now appears it is about a millimeter too big and would require filing down a bit. Will research the bits on Amazon referenced earlier in this thread by nagant. The $36+ tool I see on ebay is too rich for my blood. Will only be using a few times.
    x.JPG
     
  10. TSPORT United States

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    Looks like the Amazon offerings are not quite right, either. There's a 3mm and then it jumps to 4.35mm. There's another set with a 4.03mm bit that may be tapered easily to fit.
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  11. snwcmpr

    snwcmpr SotM Winner Subscriber

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    It has been said, do not use the rounded style bits. They can easily damage it.
     
  12. TSPORT United States

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    Yes, I read that. The ones I posted pics of are true pentaganol bits, no rounded corners.
     
  13. nmp

    nmp SotM Winner Subscriber

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    Personally I just got an Allen key and filed it down until it fitted.
    Good luck.
     
  14. Rick Robinson

    Rick Robinson United States Subscriber

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    You're right. I had the Amazon set. One bit seems to fit but upon turning it seems to round out the hole. The next size up is too large. Is it possible to file those sides a bit?
     
  15. Rick Robinson

    Rick Robinson United States Subscriber

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    What do the Swedes use?