Self-tapping - WINNING INSERTS

The external thread of SPIROL's self-tapping threaded insert forms an internal thread in a pre-formed or pre-drilled hole during the installation process in a plastic assembly. SPIROL Series 10 Self-Tapping Threaded Inserts are thread-forming inserts that are best suited for softer thermoplastics or thermosets. Self-tapping threaded inserts provide the best pull-out strength for an insert installed post-manufacturing, but they are generally more expensive than threaded inserts that are pressed into a pre-formed hole after injection molding. The external threads are designed with a thin profile to minimize induced stresses in the plastic and feature a relatively coarse pitch to achieve the maximum plastic shear area that resists pull-out.