Si mi vista no me falla, creo que te refieres a eso.

Saludos!
Marta

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Note added at 41 mins (2009-04-02 15:42:22 GMT)
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aunque algunas fotos podrían ser "cierre de rosca" aunque esto se usa normalmente para otro tipo (véase http://images.google.es/imgres?imgurl=http://www.finagarcia.... no he encontrado ninguno que ponga "cierre tipo barril" ni nada así.

What are Barrel Clasps?


Barrel Clasps are a particular type of jewelry clasp that is sometimes used for necklaces. They are two part cylindrical screw clasps that look like barrels (hence the name), each with an eyehook or connector loop. They usually feature some sort of ridges around the barrel for easier grasping when trying to fasten - you simply rotate one part into the other.

We use these clasps quite frequently for necklaces. They provide greater security than magnetic or hook type clasps, though they are a bit more difficult to attach around the back of your neck. Barrel clasps do seem to be easier than lobster claw clasps to open up which is why we often prefer them for necklaces.

The picture above shows barrel clasps in base metal… this can be a great first connector to use when starting out making beaded necklaces. Note the loops on the ends are not “shut” which allows you to use pliers to open them up should you need to change or attach it to another closed loop. They also make them in silver and gold, although those are much more expensive. You can usually find them at Joann.com or Michael’s. Give them a try if you’re looking for a different type of connector clasp.



Barrel clasp: A method of securing two ends of a chain together by having one half of a fitting screw into the other half. When the two halves are screwed together they resemble a barrel.

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Note added at 1 hora (2009-04-02 16:17:20 GMT)
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En esta página lo han traducido como: "cierres a rosca", pero no me parece que describa el sistema de cierre correctamente. La verdad es que no encuentro nada más al respecto. Seguiré investigando.

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Barrel clasps, 14 carat gold-plated/silver-plated, 5 pcs. ... Cierres a rosca, bañados en oro 14 quilates/bañados en plata,5 u. ...
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