shakeproof

Of a washer: resistant to being loosened by vibration.

Adjective

  1. Of a washer: resistant to being loosened by vibration.
    • Attach the battery tray to the frame with the three bolts. Place a shakeproof lock washer under the head of each bolt and under the attaching nuts, and attach the fuel line with the clip to the center battery tray bolt....
    • The ideal place to achieve this bonding is close to the entry of the power cable. The bond should be made using a solder tag bolted to the chassis with a shakeproof (star) washer […] - 2004, Morgan Jones, Building Valve...

Origin

From shake + -proof.