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

Harbor Freight CRC cutting lubricant is the best for threading black pipe.