Hi, I have an 82' c30 and would like to replace the closed body turnbuckles with open body ones. Does anyone know what thread size these are?
Turnbuckle thread size
- Thread starter o0o0o0o0o
- Start date
Having nuts around to test with is handy. But it's going to cost as much as an inexpensive pair of calipers while giving you a tool that only does one thing, compared to the nearly limitless uses of the calipers. (To say nothing of the inconvenience of finding left-handed nuts.) Also, you can't use that method to determine the thread of something while it's assembled. And, if you really want the system to be usable, you'd need metric nuts, too, more than doubling the cost.
If you really want the optimum system, get the calipers and then a thread pitch gauge, to make your pitch measurements quicker and more accurate.
Read the catalogs, dude. There are lh/rh nuts for each size of turnbuckle. If you can't eyeball the difference beteween the lifeline wire, you need the calipers and some reading glasses. Been there done that, have my own tools to make lifelines for my entire boat- and for friends on need. West Marine or SBO probably has everything you need. LH nut are frequently used in lifelines.
This ^^^.
You will see there's only so many sizes, and you can quickly divine by intuition what you have.
It would be quite unusual to have 3/8 on a 30 footer. You need to measure the SS wire, not the white plastic. Buy the new stuff as bare wire, not plastic coating. I sure wish they made blue.
I measured the threads. The wire is 1/4 for the uppers and 3/16 for the lowers. I'm not sure what plastic you're referring to but I don't have any plastic around there.
The wire can come with a plastic coating of some type, or you can buy the wire without it, so it should be cheaper.
I confess I'm amused that a topic like this could result in 11 replies. First, if you can't figure out what size turnbuckles you have, maybe you shouldn't be attempting this on your own. Second, it seems there's confusion over whether these are for standing rigging or for lifelines, per the plastic-coated comment. So, what is it? This is something you can easily look up.
You are right ! EVEN WHEN I SAID LIFELINE HE STILL DID NOT SPECIFY HIS SITUATION. WE STILL DON'T KNOW for sure, DO WE?
The closed body turnbuckles were only used on the standing rigging of Catalina's, made by Garhauer.
GarhauerMarine.com - Turnbuckle TB-4BSC
GarhauerMarine.com - Turnbuckle TB-4BSC