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A cotterless pin fastener, also known as a quick-release or detent pin, is a tool-free fastening device designed for easy assembly and disassembly. Featuring a cylindrical body with a spring-loaded detent mechanism, these pins offer a quick-release design that allows for rapid insertion and removal without the need for additional tools. Cotterless pins come in various configurations, including straight, T-handle, and button-handle designs, and find widespread use in machinery, manufacturing, and equipment assembly where frequent adjustments or swift connections are essential. They are available in different materials and sizes to suit various applications, providing a convenient and efficient alternative to traditional cotter pins.