Regulator bolts

Discussion in 'Steyr' started by Knockedover, Aug 31, 2015.

  1. Knockedover

    Knockedover CSFTA Champ

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    Looking to order up some replacement regulator bolts to replace the often mashed up originals I come across when servicing but need the thread pitch/size. I don't currently have my pitch gauge with me and it's a bit vague trying to do it on my dial calipers :D If some kind soul could furnish me with the dimensions I'd be very grateful :)
    cheers:)
     
  2. saddler

    saddler Phil Gee

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    I believe that the 4 bolts holding the reg to the trigger block are M3.
    The 2 that hold the reg together are M3.5 but the head diameter and thickness is turned down to fit the same size counterbore as the M3s that hold the reg to the block for some strange reason.
     
  3. hmangphilly

    hmangphilly The Doctor

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    the 4x mounting bolts m3.5 x0.6 on mine......they look standard.

    chris c is your man for these
     
  4. Knockedover

    Knockedover CSFTA Champ

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    Cheers guys, I've now found a source of decent quality stainless replacements including the reduced head sized ones at a decent price :)
     
  5. hmangphilly

    hmangphilly The Doctor

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    do tell .
    some spares would be handy:)
     
  6. Knockedover

    Knockedover CSFTA Champ

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    It's a company called fastener express in the US. Probably not ideal if you just want to order a few bolts but as I'll be ordering a load of bits and pieces the 8 quid for shipping is worth it for me :)
     
  7. RobF

    RobF Administrator Staff Member

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    Can you get a few sets for me Vin? I'll weigh you in at the AB :)
     
  8. hmangphilly

    hmangphilly The Doctor

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    Me too ,
    I'll chip in toward the postage .
    Could you put the specs up on here ..
     
  9. saddler

    saddler Phil Gee

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  10. RobF

    RobF Administrator Staff Member

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    Do they do them?

    I couldn't find them in the UK. The bolts are a low profile head and the thread is an odd length and the blank bit without a thread (technical term) only added to the difficulty of the spec when I searched.
     
  11. saddler

    saddler Phil Gee

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    I did get some standard stainless cap heads turned down to fit the reg, but as the stainless is softer, the shorter hexagon gets chewed up real easy. I had to get our toolroom to get them out.
    Now, I use the standard steel ones from ChrisC.
     
    Last edited: Sep 2, 2015
  12. DEAN C.

    DEAN C. Steyr Convert

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    Hi

    Knowing the properties of stainless it would probably be better to use high tensile steel to be honest. 8.8 or 10.8 would be tougher than stainless. Less rounding off .
    Stainless would be fine if they didnt have to be shortened on the head.


    Thanks.
     
    Last edited: Sep 2, 2015
  13. RobF

    RobF Administrator Staff Member

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    agreed... any corrosion on these and they can get stuck. Wera allen keys are your friend (as recommended by Jon Harris)
     
  14. Knockedover

    Knockedover CSFTA Champ

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    I should be ordering up early next week and will post up when I've received them, I'll stick some extra on the order so I'll have some spare should anyone want some :) the head depth on the bolt isn't shallower it's just a reduced diameter. They don't have to be cranked up to ridiculous torque so I'd imagine a touch of copper grease and sensible tightening should be fine. I think the issue with the standard ones are the degree to which they are tightened combined with poor sizing of the fitting for the allen key, ive tapered down a torx bit just for the job of removing the mashed ones as it's a common issue on tinkered with guns.
     
    Last edited: Sep 2, 2015
  15. DEAN C.

    DEAN C. Steyr Convert

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    The copper grease would help corrosion but increases torque massively, increasing the risk of shearing, especially stainless which has a lot lower shear limit. Basically grease reduces friction and therefore decreases torque felt when tightening up. A tiny drop of thin oil might be better.;)

    I love stainless bolts and use them on a lot of guns and mounts, but just be aware of their limits and you will be ok.

    They cannot be any worse than the soft steel stock adjustment bolts in the EV2's which round off for fun in my Mk4. I've not had the pleasure of stripping the Steyr yet, it's shooting too well but I am sure I will be doing at some point as it looks like it is going too be a long term ownership.:)
     
    Last edited: Sep 3, 2015
  16. hmangphilly

    hmangphilly The Doctor

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    Whatever happened to the reg bolt situation Vince ?

    any progress?
     

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