advice on these terminals? (See pic )

[Scare_Rab]

I'm looking at a 2nd hand Yacht.
what do we think of this type of turnbuckle?
What ought I check?

[Wotname]

They are fine. I note there is no lock nut or safety wire or split pin. There should be something to stop them undoing.
Check the visible threads are not damaged and that they still turn!

Presumably they are bronze or SS.

I use open body turnbuckles similar to this style.

[SkiprJohn]

Agree with Wotname. Chrome over bronze would be very good. Yes, you need to have a split pin in the hole through the threads in order to keep them from turning out.

[Jesse]

Cotter rings work well and don't snag on things.

[JPA Cate]

For those who don't like cotter rings coming undone, you can use a short pan head screw in the hole, too.

Some people put a blob of silicone sealant over the two legs of a cotter pin, if they prefer those, to help lines not get snagged.

Ann

[gjordan]

The wire appears to be swaged directly to the upper screw of the turnbuckle. This is a common, and acceptable method, but where the wire goes into the swage (squeezed portion) of the screw is where you should look closely. Take some SS polish with you and polish anyplace that SS has been squeezed like that, and use a magnifying glass to look for cracks. Turnbuckles sometimes crack, but wire end fittings crack far more often. Just my 2 cents worth. _____Grant.

[mariner36bob]

"What ought I check?"

Sort of on topic......pinch a
cotton ball between fingers, run it up the stay, if it snags pay close attention. Mark it and inspect further. Even little snag on outside means cables not intact.

I personally have an aversion to silicone, the stuff never comes off, instead I like to wrap some fresh tape around cotter pins once in place.

[Tempo Spars]

That is a Ronstan open body turnbuckle. The threads are past the safe bearing point so all ok. Looks to me to be 1/2 from the image but can not be sure, there will be some numbers on the neck of the swage stud that will indicate the wire and thread size. I would use lock nuts, cleaner neater etc. also this turnbuckle was only released approx five years ago so the rigging is relatively new.

Good luck with the purchase.