H30, I believe. But why not ask the Factory what they use now?
Duncan McF.
> On 02 October 2020 at 00:30 Brian Phillips <barp99@gmail.com
> mailto:barp99@gmail.com > wrote:
>
>
> I am currently attaching the port flap to the wing on my trigear, I
> find, for whatever reason, that the W20 bracket is too short by 12mm
> when the flap is in its correct position. Rather than live with this
> mismatch at the bolted joint, I will make up a new longer W20 bracket.
> Does anyone know what grade and temper these aluminium brackets are made
> from?
>
> Brian
> Sydney, Aus.
>
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