Coiled pins and slotted pins are types of mechanical fastener that provide a versatile and cost effective fastening solution.
Slotted spring pins are rolled from stainless steel A2 or spring steel into a hollow ‘C’ shape. This type of fastener has a slot running down it’s length, which is sufficiently wide enough to enable the pin to contract as it is driven into the hole. After insertion, the force of the pin against the wall of the hole will keep the pin secured. Technifast offer a choice of heavy or light duty pins depending on the application.
A coiled spring pin is a hollow cylindrical pin, formed from a 2¼ coil of either spring steel or stainless steel with swaged chamfers at each end to aid insertion. The coiled pin is a self-retaining fastener which works in a similar manner to a slotted pin, but the design allows for the stresses to distribute equally across the coils after insertion. To provide for different requirements of strength and flexibility Technifast stock a standard duty recommended for most applications and a heavy duty version which is typically used in high shear strength applications and hardened host materials.
Installation of these types of pins requires very little preparation, the user simply needs to drill a hole of an appropriate size to accommodate the pin; there is no reaming operation involved which, in turn, helps to keep production costs low.