The fifth-wheel coupling provides the link between a semi-trailer and the towing truck, tractor unit, leading trailer or dolly. The coupling consists of a kingpin, a 2-or-3+1⁄2-inch-diameter vertical steel pin protruding from the bottom of the front of the semi-trailer, and a horseshoe-shaped coupling device called a fifth wheel on the rear of the towing vehicle. As the connected truck turns, the downward-facing surface of the semi-trailer rotates against the upward-facing surface of the fixed fifth wheel, which does not rotate. To reduce friction, grease is applied to the surface of the fifth wheel. The configuration is sometimes called a turn-table in Australia and New Zealand, especially if it is a rotating ball-race-bearing type. The advantage of this type of coupling is towing stability.
"}{"fact":"A cat will tremble or shiver when it is in extreme pain.","length":56}
{"type":"standard","title":"Glaros","displaytitle":"Glaros","namespace":{"id":0,"text":""},"wikibase_item":"Q358321","titles":{"canonical":"Glaros","normalized":"Glaros","display":"Glaros"},"pageid":5437123,"thumbnail":{"source":"https://upload.wikimedia.org/wikipedia/commons/thumb/2/24/Glaronisi_084742.jpg/330px-Glaronisi_084742.jpg","width":320,"height":213},"originalimage":{"source":"https://upload.wikimedia.org/wikipedia/commons/2/24/Glaronisi_084742.jpg","width":3471,"height":2311},"lang":"en","dir":"ltr","revision":"1286296470","tid":"eaf28e73-1cb2-11f0-b72c-15800714fdb1","timestamp":"2025-04-19T00:12:02Z","description":"Island in Greece","description_source":"local","coordinates":{"lat":36.915,"lon":25.605},"content_urls":{"desktop":{"page":"https://en.wikipedia.org/wiki/Glaros","revisions":"https://en.wikipedia.org/wiki/Glaros?action=history","edit":"https://en.wikipedia.org/wiki/Glaros?action=edit","talk":"https://en.wikipedia.org/wiki/Talk:Glaros"},"mobile":{"page":"https://en.m.wikipedia.org/wiki/Glaros","revisions":"https://en.m.wikipedia.org/wiki/Special:History/Glaros","edit":"https://en.m.wikipedia.org/wiki/Glaros?action=edit","talk":"https://en.m.wikipedia.org/wiki/Talk:Glaros"}},"extract":"Glaros or Glaronisi (Γλαρονήσι) is an island that belongs to the Lesser Cyclades. It lies approximately 0.6 nautical miles (1.1 km) south of Koufonisi and is only about five hundred metres east of Kato Koufonisi. Glaros is extremely small, flat, uninhabited and nearly barren. This island can be visited from Koufonisi only with a special arrangement with any of the local boatsmen. There are around five small rocky islets off the east coast of Glaros.","extract_html":"
Glaros or Glaronisi (Γλαρονήσι) is an island that belongs to the Lesser Cyclades. It lies approximately 0.6 nautical miles (1.1 km) south of Koufonisi and is only about five hundred metres east of Kato Koufonisi. Glaros is extremely small, flat, uninhabited and nearly barren. This island can be visited from Koufonisi only with a special arrangement with any of the local boatsmen. There are around five small rocky islets off the east coast of Glaros.
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