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Thread: Replacement Optilock base screws

  1. #1

    Replacement Optilock base screws

    I ruined an optilock base screw and couldn't find an easy replacement so measured the screw and found a good place to order them. Here are the specs and linky:

    M5 x 8 Socket Head Low Cap Screw (DIN7984)

    A2 Stainless M5 Socket Low Head Cap Screws (DIN 7984)
    Last edited by takbok; 04-04-2016 at 07:17. Reason: Dont have any more screws left

  2. #2
    These stainless screws are a lot harder than the originals and one doesn't have to worry about rounding the hex like with the originals.

  3. #3
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    Great offer nice to know there are some genuine people out there. Stainless great for corrosion resistance and bet they are just the job for scope mounts

  4. #4
    It always seems there are a suspicious number of Optilocks for sale in the classifieds. Why is this, and is it anything to do with the licorice screws?

  5. #5
    Odd as Stainless screws and bolts are considered softer and weaker that good H/T carbon steel scews and bolts in cars. In fact I was warned off using stainless bolts in the front sub frame mounts on the MG as they are weaker that the original H/T bolts. Same goes for the front hub pinch bolts I wanted to replace the rusted H/T steel ones with a stainless ones but was informed they were not strong enough as the originals are 10mm 12.9 H/T I think it is

  6. #6
    Quote Originally Posted by Conure View Post
    Odd as Stainless screws and bolts are considered softer and weaker that good H/T carbon steel scews and bolts in cars. In fact I was warned off using stainless bolts in the front sub frame mounts on the MG as they are weaker that the original H/T bolts. Same goes for the front hub pinch bolts I wanted to replace the rusted H/T steel ones with a stainless ones but was informed they were not strong enough as the originals are 10mm 12.9 H/T I think it is
    Yes, the originals I removed were grade 10.9 (900 MPa ultimate strength) vs the A2-70's (700 MPa). The stainless ones are definitely harder though and I'm able to tighten them just as tight despite having a 3mm hex vs the original 4mm hex.

    I think that the problem is that the optilock screws are not the spec that they say they are. Good quality HT screws would work fine.
    Last edited by takbok; 16-03-2016 at 11:26.

  7. #7
    Still a few here if anyone needs some.

  8. #8
    funnily enough I've just had this happen to me today. From an engineering view point Optilocks have a few downsides.
    A simple step in the base where the ring mounts would stop the ring turning when tightening. It would make more sense to be able to remove the ring without having to take the base off, ie bolt through the ring not up through the base

  9. #9
    Hi Rory,

    I wouldn't mind four, if they're still available please.
    Please pm me for any postage/packaging/favourite charity costs etc,

    cheers, Tedward.

  10. #10
    Screws all gone now.

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