The Spiralock Drive Notch wire thread insert from Spiralock Corp. (Madison Heights, MI) exhibits no tension loss after 24 hours of continuous vibration testing and no fatigue indication. The inserts are simply threaded into any STI tapped hole, with no tangs to break off, retrieve, or account for. The insert resists shock, vibration, and thermal extremes, and provides improved joint integrity in softer materials such as aluminum, zinc, magnesium, and plastic. The insert also eliminates stress in the parent material and requires no staking, keys, or lock rings to hold them in place.
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