wrenchman

noun

1. A mechanic, especially one who uses a wrench for on most jobs.“Assuming that we are laying a Metre-gauge Line, the following labour would probably be required on the first day:— / Description.[…]Remarks.[…]Beldars[…]Carrying fish-plates and bolts, and assisting wrenchmen to fish the joints. / Wrenchmen[…]Fishing the rails together. / Carpenters[…]Countersinking bearing-plates. Making tool-handles, and distance-wedges for wrenchmen. Nicking the sleepers if nec”