pin slotSpring Pins go by many different names, including spring tension pins, Sellock pins, roll pins and slotted spring pins. Spring pins are a self-locking fastener that use tension to hold two or more components together. They are essentially aSpring pin fasteners, also known as roll pins, split pins, or slotted spring pins are cylindrical metal pins with a split down their length that allow them to compress and expand when inserted into