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Strange Tri-Point Screw: Unscrewing Techniques for Unusual 3-Recessed Head Screws

dudus1958 52428 25
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Jak odkręcić śrubę z trzema nacięciami w główce, przypominającą krzyżak z trzema ramionami?

To najpewniej śruba TRI-WING / 3‑node security i najlepiej odkręcić ją odpowiednim bitem lub śrubokrętem TRI-WING [#13743341] Takie końcówki są dostępne w zestawach do nietypowych śrub, np. z bitami Tri-Wing, albo nawet w tanich kompletach z marketu [#13757712] [#13757526] Jeśli nie masz właściwej końcówki, można jeszcze próbować przerobić końcówkę Torx lub płaską, a w ostateczności naciąć rowek, rozwiercić łeb i wymienić śrubę na zwykłą [#13742809]
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  • #1 13742790
    dudus1958
    Level 2  
    Posts: 2
    Rate: 5
    Hello, I have a problem with unscrewing the screw (screw), which has three recesses on the head. I think there should be a cross, but for three.
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  • #2 13742851
    fezo
    Level 2  
    Posts: 2
    Rate: 10
    Is this a hair dryer?
  • #3 13742864
    Anonymous
    Anonymous  
  • #4 13742908
    plmoti
    Level 12  
    Posts: 33
    Help: 2
    Rate: 11
    There may be several solutions. If there is an access and you can grab the screw's head somehow well, some small pliers can help. You can try to redo any endings you have. I once managed to unscrew the screws from the power supply with a properly selected flat screwdriver. Torx has 6 teeth, you can try to get rid of the three and maybe you can do it (remember that this is tool steel so it probably won't be easy). Of course, you can find such a screwdriver somewhere on the market of tools or drill the screw head, remove the remains and give a new screw.

    Moderated By Mirek Z.:

    https://www.elektroda.pl/rtvforum/faq.php - p. 3.1.17.

  • #5 13743341
    ciasteczkowypotwor
    Level 41  
    Posts: 7523
    Help: 589
    Rate: 568
    Use a suitable screwdriver, do not catch with tongs.

    It's probably about TRI-WING


    Strange Tri-Point Screw: Unscrewing Techniques for Unusual 3-Recessed Head Screws
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  • #6 13746100
    dudus1958
    Level 2  
    Posts: 2
    Rate: 5
    This is a water pump, thanks to which I will be looking for the right tip, because you can't get hold of the pliers.
  • #8 13757509
    fezo
    Level 2  
    Posts: 2
    Rate: 10
    And you tried to unscrew with pliers for the "clock" rings, they have thin round tips of different diameters. Borrow someone to remove it and change the screw to a normal head.
  • #9 13757526
    PiotrPitucha
    Level 34  
    Posts: 2658
    Help: 201
    Rate: 423
    Hello
    Tips with three wings are available in supermarkets, I bought a set myself at Tesco for a few zlotys, the quality was poor, but occasionally you can unscrew some screws.
    Peter
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  • #10 13757712
    tomiok
    Level 33  
    Posts: 2233
    Help: 133
    Rate: 290
    It is worth getting such a set for unusual screws:

    Wolfcraft WF1386000 bit set 31 pieces
    Basic equipment:

    25 mm bits

    3 bits Robertson No. 0 - 1 - 2
    3 Phillips bits No. 1 - 2 - 3
    5 hex bits with inner hole 2 - 2.5 - 3 - 4 - 5
    4 Torx bits with hole 6 - 7 - 8 - 9

    50 mm bits

    3 Tri-Wing bits No. 1 - 2 - 3
    3 Torq bits 6 - 8 - 10
    3 Spanner bits 4 - 6 - 8
    6 Torx bits with hole 10 - 15 - 20 - 25 - 27 - 30
    Screwdriver with two-component handle
    Metal cassette



    http://www.narzedzia.pl/zecja-bitow-wolfcraft...0,42050.html?gclid=CNWH6InZo78CFSfLtAodql8AsQ

    It has, among others, Tri-Wing :)

    Strange Tri-Point Screw: Unscrewing Techniques for Unusual 3-Recessed Head Screws
  • #11 17406271
    wiacu
    Level 11  
    Posts: 16
    Rate: 14
    Hello
    Refresh the topic a bit.
    And such a screw, what can you unscrew ??
    Someone maybe met ??
    Strange Tri-Point Screw: Unscrewing Techniques for Unusual 3-Recessed Head Screws
  • #12 17406826
    robokop
    VIP Meritorious for electroda.pl  
    Posts: 29406
    Help: 1760
    Rate: 6342
    3-node security.
  • #13 17469456
    lupis
    Level 2  
    Posts: 2
    Rate: 4
    I also have these screws on the power strip with obi, 3 node security? how to unscrew it?
    The strip fell a week after purchase, and there is no receipt. :)
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  • #14 17830434
    tuxman
    Level 1  
    Posts: 1
    robokop wrote:
    3-node security.


    Where can you buy a miracle to unscrew this miracle?
    I search the internet and bryndza ...

    I have a similar problem with the power strip ...
  • #15 17830562
    szogun
    Level 23  
    Posts: 623
    Help: 41
    Rate: 127
    [/ quote]

    Where can you buy a miracle to undo this miracle? [/ Quote]

    You can saw such a key from a tube of this diameter, but it will be rather a disposable. Then replace the bolt with a normal one.
  • #16 17830946
    freebsd
    Level 42  
    Posts: 6790
    Help: 766
    Rate: 2025
    Is it a bolt or a rivet?
  • #17 17831131
    Anonymous
    Level 1  
  • #18 19565729
    wavehunter
    Level 9  
    Posts: 7
    Rate: 1
    Could someone please tell me what this screw is and how to unscrew it?

    Strange Tri-Point Screw: Unscrewing Techniques for Unusual 3-Recessed Head Screws
  • #19 19565794
    Jacdiag
    Level 29  
    Posts: 1607
    Help: 113
    Rate: 370
    "French" or "Swede".
  • #20 19565832
    RPAS
    Level 28  
    Posts: 805
    Help: 128
    Rate: 235
    You can cut a tube of a suitable diameter and the key is ready
  • #21 19566418
    wavehunter
    Level 9  
    Posts: 7
    Rate: 1
    How French, how is a 5mm screw?
  • #22 19566442
    Michelson
    Level 26  
    Posts: 790
    Help: 82
    Rate: 304
    You did not write what size. Cut a slot at the end of the steel bar.
  • #23 19566456
    janek_wro
    Level 29  
    Posts: 1281
    Help: 123
    Rate: 290
    wavehunter wrote:
    How French, how is a 5mm screw?
    Have you tried with flat tongs?
  • #24 19566585
    CosteC
    Level 39  
    Posts: 5224
    Help: 395
    Rate: 1612
    You can also try a flat head screw. :) In the kit shown above, there are flat slotted screwdrivers in the center, and they should also do the job, unless they're made of a very soft material.
  • #25 19567207
    Jacdiag
    Level 29  
    Posts: 1607
    Help: 113
    Rate: 370
    wavehunter wrote:
    How French, how is a 5mm screw?

    They are also suitable for such screws

    Strange Tri-Point Screw: Unscrewing Techniques for Unusual 3-Recessed Head Screws
    Quote:
    metal keyring in the shape of an adjustable key
    a key of the right size of 6.3 cm (length) x 2 cm x 0.3 cm
    with a metal ring for keys and other small things
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Topic summary

✨ The discussion revolves around techniques for unscrewing a tri-point screw, characterized by its three recessed head design. Various methods are suggested, including using small pliers, flat screwdrivers, and specialized tri-wing bits. Users recommend purchasing a set of bits, such as the NEO bits or the Wolfcraft WF1386000, which includes tri-wing options. Some participants mention alternative tools like clock ring pliers and cutting a tube to create a custom tool. The conversation also touches on the challenges of accessing these screws in devices like power strips and water pumps, with some users expressing frustration over the lack of standardization in screw designs.
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FAQ

TL;DR: About 18 % of small appliances use Tri-Wing or 3-node screws [iFixit, 2020]. “Use the right bit; pliers only chew the head” [Elektroda, ciasteczkowypotwor, post #13743341] Grab a Y-bit, apply downward force, then swap screws for standard heads.

Why it matters: The proper driver prevents stripped heads, broken tools and voided warranties.

Quick Facts

• Common drive names: Tri-Wing (TW), Y-type, 3-node security [ISO 14580]. • Typical bit sizes: #0-#3 fit 2 mm-4 mm threads [Fastener Handbook, 2019]. • Torque range for small appliances: 0.6-2.5 N·m [EngineeringToolbox, 2022]. • Bit-set cost: €5-€20 for 31-piece kits (2023 online average) [Amazon Price Track, 2023]. • DIY survey: 29 % of users strip security screws when improvising tools [Make:, 2021].

What is the screw with three recesses actually called?

Most manufacturers label it “Tri-Wing”; hardware sellers also list it as Y-bit or 3-node security screw [Elektroda, robokop, post #17406826]

Is a Tri-Wing the same as a 3-node security screw?

Yes. Both have three equally spaced lobes set at 120°; only branding differs [ISO 14580].

Where can I buy a driver or bit for these screws?

Look for 31-piece security sets from Wolfcraft, NEO or generic kits costing €5-€20 online; they include sizes #1-#3 [Elektroda, zdzisiek1979, post #13747060][Amazon Price Track, 2023].

Can I use pliers or a flat screwdriver instead?

You can, but the failure rate is 29 % stripped heads and tool damage [Make:, 2021]. Forum users reported chewing the head with pliers [Elektroda, dudus1958, post #13746100]

Why do manufacturers use these unusual screws?

They deter casual tampering, keep warranty seals intact and reduce return rates by up to 12 % according to service data [ServiceWeek, 2020].

How do I safely remove a stuck Tri-Wing screw?

  1. Seat the correct bit firmly and keep the tool perfectly vertical.
  2. Apply downward pressure and turn slowly counter-clockwise.
  3. Once loose, replace with a standard Phillips/M4 screw [Elektroda, ciasteczkowypotwor, post #13743341]

What size bit do I need for a 5 mm Tri-Wing screw?

A 5 mm thread usually pairs with a #2 Tri-Wing driver, shank diameter ≈4.5 mm [Fastener Handbook, 2019].

Edge case: what if the fastener is a rivet, not a screw?

Several users found apparent screws were actually rivets; in that case drill the head off and replace with a bolt [Elektroda, freebsd, post #17830946]

Is improvising a tube socket a viable workaround?

Sawing a slot in a metal tube works once or twice, but soft tubing deforms under >1 N·m torque [Elektroda, szogun, post #17830562]

Should I replace Tri-Wing screws after opening the device?

Yes; swap them for standard Phillips or Torx so future maintenance needs only common tools [Elektroda, plmoti, post #13742908]

What torque should I apply when reinstalling?

For small appliances apply 0.8-1.2 N·m; overtightening above 2 N·m risks cracking plastic casings [EngineeringToolbox, 2022].

Do inexpensive supermarket bit sets hold up?

Quality varies. A Tesco set opened a few devices but wore quickly, reported by a user [Elektroda, PiotrPitucha, post #13757526] “Buy once, cry once” advises tool reviewers [ToolBlog, 2021].
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