Principle
 |  | The SPREDSERT® with retaining flange is placed in the through hole from the underside until the flange is seated. At this point, the slotted, diamond-knurled anchoring section is compressed. When a screw is inserted, the diamond-knurled section of the threaded insert is forced open and the diamond knurling bites into the plastic. The retaining flange acts as a shoulder and provides a high degree of protection against pull-out. Screw locking is also achieved via this process.
The tightening torque is to be increased by 10% for the additional expansion force. |
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Installation of a SPREDSERT®