Threaded Fasteners for plastic - Infastech

s u c c e s s w i t h F a s t e n e r s F o r P l a s t i c s
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imProving PerFormance & reducing cosTs
Made from a thermoset plastic, an industrial circuit breaker
originally utilized a threaded insert/machine screw combination.
Engineers knew that replacing this combination with a single
screw would reduce costs, so they tested several different
fasteners in the application. A Duro-PT ® screw with TORX PLUS ®
Drive outperformed all of them. The thread design provides the
high resistance to strip-out and vibration loosening they need,
while the TORX PLUS Drive optimizes the torque transfer
required to cut threads in the hard material.
mainTaining inTegriTy oF aPPlicaTions
Normal in-service loads caused boss cracking problems, loose
fasteners and rattle problems in these glove box doors,
resulting in high warranty costs. We were called in to offer an
alternative that would allow the customer to use their existing
design. We developed a PT ® screw that eliminated boss
cracking, offered positive resistance to vibration loosening, and
eliminated rattles in the dashboard from the glove box door.
increasing assembly eFFiciency
A patented design for an automotive fluid reservoir and fan
shroud required a fastener that could be included in the blowmolding
process and would maintain the integrity of the
application. This custom-designed PlasTORX ® stud is molded
directly into the unit, eliminating through holes and resulting in
a more cost-efficient assembly. Because of their high resistance
to rotation and pull-out, the PlasTORX studs also increase the
reliability of the application.
eliminaTing Problems on The assembly line
Cracking and boss failure were common problems for an audio
components manufacturer who tried to seat sheet metal screws
in plastic bosses. Our applications specialists reviewed the
application and determined that a Plastite ® fastener would fit in
the current boss design. The Plastite fastener generates less
radial stress in the application than the sheet metal screw, so
boss damage is minimized, increasing product reliability.