A turnbuckle, stretching screw or bottlescrew is a device for adjusting the tension or length of ropes, cables, tie rods, and other tensioning systems. It normally consists of two threaded eye bolts, one screwed into each end of a small metal frame, one with a left-hand thread and the other with a right-hand thread. The tension can be adjusted by ...
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http://en.wikipedia.org/wiki/Turnbuckle
A metal fitting used to adjust the tension on standing rigging.
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Tensioning device using right handed and left handed threads for adjustment. Also called a rigging screw when used on shrouds.
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A coupling, threaded right and left or swiveled on one end, for adjustably connecting two rods.
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a tensile attachment of the shrouds to the gunwale
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A turnbuckle is a coupling screwed at both ends, noe end having a right-hand and the other end having a left-hand thread, to which the ends of two bars are screwed. By turning the turnbuckle the screw threads enter further into the screwed sockets, and the bars are drawn nearer together. Turnbuckles are used for applying tension to steel-wire ropes...
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A catch or button for a door, commonly found on shed doors. Can be made from metal or timber.
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http://www.woodworkersuk.co.uk/blog/carpentry-and-joinery-glossary/carpentr
A double-ended eyebolt with a left and right-handed thread in the central nut. A turn of the latter draws both bolts together, thus increasing the tension in the rod or wire to which the turnbuckle is attached. Turnbuckles were used profusely on the older wire-braced aeroplane structures.
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noun an oblong metal coupling with a swivel at one end and an internal thread at the other into which a threaded rod can be screwed in order to form a unit that can be adjusted for length or tension
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A rotating sleeve or link with internal screw threads at each end and used to tighten or connect the ends of a rod.
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https://www.encyclo.co.uk/local/21107
a link or sleeve with a swivel at one end and an internal screw thread at the other, or with an internal screw thread at each end, used as a means of uniting or coupling, and of tightening, two parts, as the ends of two rods.
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https://www.infoplease.com/dictionary/turnbuckle
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