Bought a new wakeboard and the screws in previous wakeboard don't fit the tapped holes in new boards ... previous screws were 1/4" x 20 UNC
The threads in the new board appear to be 26 tpi on 0.2295" diameter
The nearest I could find to match would be 7/32" Cycle thread ... which seems a bit obscure for a water sport board .... unless someone else can identity the thread?
Metric? 6mm fine thread?
1/4" British Standard Brass, although the effective diameter should be 0.2254".
Colin Bignell
More likely 6mm with coarse thread - which has a pitch of 1mm (or 25.4 TPI) rather than the fine which has a pitch of 0.7mm (~36 TPI).
In article , Rick Hughes writes
What does the manufacturer say :-?
Not an instant answer obviously but it will be 100% reliable and you wont risk wrecking the inserts on your new toy.
Whenever you see 26tpi, the thread table to reach for is British Standard Brass, which are all 26tpi.
Colin Bignell
Fair enough. But he did say that the thread "appears" to be 26tpi - so I don't know how accurately he was able to measure it.
Yep ... M6 Turns out is was Metric .. just not a clear thread form ... and the fact it was on a US made product threw me .... seems US are slowly migrating to metric after all.
I thought it was BS Cycle thread as that was nearest I could find ... but in the end was M6
Finally got answer from them ....they have always fitted 1/4" x 20 (UNC)
But swapped to M6 as it gives much better holding.
Glad you're sorted as I assume you will be wanting to play with it this weekend :-)
As you say, v confusing with it being an American board, no doubt they'll confuse the issue further by selling nasty a Philips head on their screws rather than Pozi. Oh, actually, they'll come with the bindings wont they . . .
That the issue not changing the binding ... jut putting them on new board .... now have to get some M6 binding screws.
These any good:
Only zinc I'm afraid but might do you short term.
Got some stainless cheesehead screws today & washers will allow up to use board tomorrow at least :-)
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