Long thread shoulder bolt

Sorry it's a bit off topic but does anyone know if it's possible to
get shoulder bolts with longer than standard threads? This is the size
I'm after:
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M6 thread, 8mm diameter by 30mm length shoulder, but I need around
20mm of thread rather than 11mm. Stainless would be preferable too as
it's to go on a motorbike.
Any ideas or do I need to get some turned up from M8 bolts?
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You can get them upto 50mm long - so maybe use a longer one and cut some extra thread on. You will need to turn some of the 8mm section down to 6mm first. You can buy them singly from Emkay (at a price) unless you want to buy a full box.
Reply to
Bob Minchin

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