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Glossary
Roll Pin (Spring Pin)
A roll pin, also called a spring pin, is a hollow, cylindrical fastener made of spring steel with a small gap along its length. When pressed into a slightly undersized hole, it compresses and exerts outward tension, which securely locks it in place without the need for threads or additional hardware. This self-retaining design makes it simple yet highly effective for joining or aligning parts.
Roll pins are commonly used in machinery, tools, and automotive applications where vibration resistance and durability are important. They come in slotted or coiled varieties, with coiled versions offering greater strength and fatigue resistance. Because of their resilience and reusability, they’re widely relied upon for dynamic assemblies.
