Slotted spring pins consist of a single coil of spring steel or stainless steel with an open slot sufficiently wide to enable the pin to reduce in diameter as it is driven into a hole of appropriate size. The ends of the pin have a beveled chamfer. They are designed for plain drilled holes but a countersink makes assembly easier, especially for the ISO 8752 type. Slotted pins are normally supplied in the heavy duty form to ISO 8752.
