I use jamb nuts.  One right-hand threaded and one left-hand threaded per turnbuckle.  McMaster-Carr (https://www.mcmaster.com) is one source for left-handed nuts.

I've never had one loosen up on its own.

Peter Nyberg
Coventry, CT
s/v Silverheels (1988/2016)


[ Sent From rhodes22.net ]

> On 2024-06-01, at 10:57:38 EDT, Graham Parker wrote:
>
> What are people's preferred method of the locking the stays once the correct 
> tension is reached? 
>  I find the cotter rings/split rings to be extremely fiddly and time consuming. 
> I bet some of you have much better solutions? 
> Cheers
> Graham Parker
> sv ‘00Sailin'
>