I bought this kit to thread the end of a solid 3/4" guide steel rod (not hollow). It really worked. But when I tried to use a hex nut on it I couldn't find one that would fit. After many phone calls I finally got someone who explained to me what MPT stands for, what is printed on each dye. THIS IS A SANITARY KIT and was never intended as a machine dye. I give it this credit because when a lot of oil was used there were actually 2 full inches of threads on the end of this solid steel rod. I'm sure I should never have done that. THIS WORKS GREAT ON A HOLLOW WATER PIPE, as does all the smaller dyes I can of course. Maybe I should have given it 5 stars. The fault was mine and I am clarifying here for the simple reason that nowhere does it say this kit is used for hollow steel tubing for plumbing purposes. This needs to be corrected.
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