pin slotFure 2. The pin on the left determines the X position of the workpiece. To overcome these issues, one of the pins can be assembled into a slot. Thus, the pin in the hole removesSpring 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 a