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Why No 7mm?

Discussion in 'Technical' started by pjgtech, Sep 16, 2019.

  1. pjgtech

    pjgtech Where we're going....we don't need roads...

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    My Weihrauch ,mods all have a 7mm hex nut to unscrew them, but every hex key set never has a 7mm one included! Why? :facepalm:

    NB: I already have a separate 7mm hex spanner / key, so I don't need one, but it just irks me that that particular size is never included in a set....

    ...I know, I know, I prolly need to get out more... :thumb:
     
    Redcap 114 and Shotaholic like this.
  2. Shotaholic

    Shotaholic Busy Member

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    ....and I thought it was just me. I must have amassed dozens of allen key sets over the years but do I have a 7mm - nope.
     
    Redcap 114 and pjgtech like this.
  3. timmytree

    timmytree Top Poster

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    7mm only goes to those who can spell probably. :D
     
  4. pjgtech

    pjgtech Where we're going....we don't need roads...

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    If you were nearer I'd let you borrow mine mate... :thumb: :) :D
     
    Redcap 114 and Shotaholic like this.
  5. Shotaholic

    Shotaholic Busy Member

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    Thanks for the thought pjgtech. Story of my life.
     
  6. brk1

    brk1 Posting Addict

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    Your buying the wrong sets @pjgtech , I went out and looked at mine, thought I'd give it a wipe to clean the numbers up, it wiped all the numbers off :facepalm::facepalm:, the cases are crap but look closely at what's in it :D:D

    hex allen key.jpg
     
    pjgtech and Redcap 114 like this.
  7. Deleted member 954

    Deleted member 954 Pro Poster

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    Cheaps sets on Ebay have the 7mm :up:
     
    pjgtech likes this.
  8. squib

    squib Keyboard Hero

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    7mm is a really odd size in fasteners, none of the standard metric hex drive screws use it, cap head or button head.
    It’s not even close to a regular imperial size, 1/4”’is 6.35mm, the next size up 5/16”’ which is just shy of 8mm.
    The only time I ever use 7mm is at work, and occasionally find 1/4” BSP blanking plugs that need a 7mm hex key.

    What part of the HW mod uses 7mm?
     
    pjgtech and Redcap 114 like this.
  9. TonyB55

    TonyB55 Engaging Member

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    I have a Remington. All the allen bolts are imperial sizes, typical Yanks.
     
  10. Bezzer

    Bezzer Posting Addict

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    Obviously never had an older Ford :) the caliper mounts were/ still? a 7mm hex. If you ever need one any motor factors will have one to save buying a set
     
    Neil Curtis, pjgtech and Marcus Iddon like this.
  11. monsta41

    monsta41 Donator

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    when i undid mine i put a screwdriver in the hole until snug then twisted it
     
    pjgtech likes this.
  12. sharpsman

    sharpsman Very Active

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    decent sets should come with a 7mm key- problem i have found is the cheapo sets are soft as toffee and false economy and really only fit for the bin.
     
    pjgtech likes this.
  13. squib

    squib Keyboard Hero

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    What bolts are they? Imperial or metric?
     
  14. RichieRich

    RichieRich Ping!

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    If it's the endcap on the HW moderator, you are probably better off with a Torx set, less chance of it rounding off the material in the end cap
     
    pjgtech likes this.
  15. Jamex2.2

    Jamex2.2 Engaging Member

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    My 7mm Allen key dates back to a mk1 Golf for adjusting valve clearances. Never got used again until the HW97 joined us. Must have sat in the spare toolbox for 25+ years!
     
    JamieB57 and pjgtech like this.
  16. Scrinja

    Scrinja EGO dont facere fatuis

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    End cap on Silencer
     
    squib likes this.
  17. Bezzer

    Bezzer Posting Addict

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    Metric, when I say older Ford I'm on about 70's onward models, Escorts and the like.
     
  18. Guloluseus

    Guloluseus Very Active

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    I've got about 6 sets of those- I either put them "somewhere safe" or lose a coule, and end up having to buy another one. Probably got 3 or 4 spare 7mms in there, I'll have a look and if I have they can go in the freebie jar at some point.
     
    pjgtech and brk1 like this.
  19. brk1

    brk1 Posting Addict

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    I was at work and we needed a 2mm allen key, guess what? nobody locally had them :(, so the company said buy the set so you can get on and they'd pay for it, guess I forgot to give them back in afterwards :rolleyes::rolleyes::D
     
    pjgtech likes this.
  20. pjgtech

    pjgtech Where we're going....we don't need roads...

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    The end cap on the HW97 is 7mm.
    I have a 7mm one now, but could not find a "set" that had one in it for ages, so I bought a separate one instead, which of course cost more!
     

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