Classics Monthly - - Seized Fittings -

If a con­cealed threaded in­sert is spin­ning in­side its hous­ing, es­pe­cially if it’s made of brass, try warm­ing it up so that it ex­pands and grips, al­low­ing the bolt that’s threaded into it to be un­wound and the in­sert re­moved. This isn’t al­ways so easy, es­pe­cially if the in­sert is fit­ted into plas­tic, so heat from a blow­torch isn’t pos­si­ble. In­stead, use an im­pact driver or sim­i­lar tool to spin the bolt that’s threaded into the in­sert at high speed. This will cre­ate heat, al­low­ing the in­sert to ex­pand.

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