STOP Doing It Wrong! Thread Steel Conduit Like a Pro Student training aid for practical skills - how to cut and thread electrical steel conduit (rigid metal conduit RMC). In this video I use a conduit bending machine, 20 mm conduit, stocks, 20 mm guide and a 20 mm die. The video includes a full demonstration on how to cut and make a thread onto 20 mm steel conduit (metal conduit) by hand. The second part of the video Steve threads 20 mm steel conduit using an electric conduit threader. The proce