Metal piercing fastener

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