apart from having all the above merits these inserts posses a polygonal central coil which exerts a prevailing and resilient torque on the bolt preventing the bolt/screw from loosening under vibrations and impacts. The bolt/screw can be fitted and...
apart from having all the above merits these inserts posses a polygonal central coil which exerts a prevailing and resilient torque on the bolt preventing the bolt/screw from loosening under vibrations and impacts. The bolt/screw can be fitted and...