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A tow hitch (or tow bar or trailer hitch in North America [1]) is a device attached to the chassis of a vehicle for towing, or a towbar to an aircraft nose gear. It can take the form of a tow ball to allow swiveling and articulation of a trailer , or a tow pin, or a tow hook with a trailer loop, often used for large or agricultural vehicles ...
In pin tumbler locks, the series of key cuts on a key causes the pins to line up at the shear line or gate so the lock will open. In warded locks, the key cuts bypass the wards so the key can push or pull the bolt. [6] Key pin In a pin tumbler lock, the key pin is in contact with the key. It has varying lengths, corresponding to the key's ...
The coupling consists of a kingpin, a 2-or-3 + 1 ⁄ 2-inch-diameter (50.8 or 88.9 mm) 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 (with ...
Automatic free wheeling hub of a 1986 Mitsubishi Pajero Mechanically (manually) activated free wheeling hub on a Toyota Land Cruiser J60 from the 1980s, with marked turning positions free and lock. Locking hubs, also known as free wheeling hubs are fitted to some (mainly older) four-wheel drive vehicles, allowing the front wheels to rotate ...
In a master-keyed lock, some or all of the pin chambers in the lock have three pins in them instead of two. Between the driver pin and the key pin is a third pin called the spacer pin, also known as a master wafer. Thus each pin line has two shear points, one where the driver and spacer pins meet, and one where the spacer and key pins meet. So ...
A car hub showing a castellated nut cover and split pin (near center) Split pins are frequently used to secure other fasteners, e.g. clevis pins, or to secure a castellated nut, [6] or, infrequently, as a low-tech shear pin. Split pins are cheaper but less reusable than linchpins, and provide less strength but easier to install/remove than ...