METAL PIERCING FASTENER

摘要

A metal piercing fastener for securing a light gauge sheet metal layer to metal/non-metal substrate layer(s) includes an elongated metal body having a crown at one end a sharpened and hardened tip at the other end defining a rigid metal penetrating region. The crown receives an impact blow from a too l for driving the rigid metal penetrating tip region in the substrates to be fastened. The metal body is equipped with one or more resilient tines each twisted at the base arount its longitudinal axis and which can be integral o r coupled to the metal body to optimize the gripping and clamping capability o f the metal piercing fastener. The resilient time may be equipped with protruding gripping and clamping elements on each side or with ribs on one o f its outer surfaces to provide spring action gripping and clamping capability during fastening. The resilient tine is capable of deflection to conform to the physical constraints of the pierced substrate opening when passing throu gh the pierced opening. The resilient tine is also capable of returning to its factory preset state of orientation when no longer constrained within the pierced substrate opening so as to grip and clamp the substrate layers being fastened between its self and the crown of the fastener.