Helicoil Plus Thread insert M3 x 0.5 x 1.5D Long Pack of 20 D 34746 53640 NARVA FUSE LINK PLUG Size:ConnectX 53640 NARVA FUSE LINK PLUG FEMALE 40A PK10 RCW441 LINISHALL CONTACT WHEEL 440 C W BEARINGS & SPINDLE Grooved to create air flow for natural cooling effect Crowned to assist belt tracking Large size range to fit most Linishing machines or custom applications 5D Long Pack of 20 Free Running Inserts Too high screw tightening torque corrosion or wear these and other factors cause thread destruction Helicoil Plus thread inserts have been developed in many different designs to repair destroyed threads within a short time