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An R-clip, also known as an R-pin, R-key, hairpin cotter pin, [1] hairpin cotter, [2] bridge pin, [2] hitch pin clip [3] [4] or spring cotter pin, [5] is a fastener made of a durable but flexible material, commonly hardened metal wire, resembling the shape of the letter "R".
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 ...
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 ...
A split pin, also known as a cotter pin, or cotter key in the US, [1] is a metal fastener with two tines that are bent during installation, similar to a staple or rivet. Typically made of thick wire with a half-circular cross section, split pins come in multiple sizes and types.
12 Volt 7-pin trailer connector ISO 7638-2 for ABS and EBS (Towing vehicle side) Physical design according to standard ISO 7638-2. [4] [6] [7] This connector is intended to be used for 12V ABS and EBS on heavy duty trailers. Identified by key tab on outer ring between pin 3 and 4. #
Towing with a drawbar is a good, practical system for many purposes, and it has continued to be used even up to today, but the three-point hitch outperforms it in several ways (described below). Harry Ferguson patented the three-point linkage for agricultural tractors in Britain in 1926.