Encyclopedia & FAQ's

DIY Frequently Asked Questions / Threaded Fitting


  • DIY Frequently Asked Questions / Threaded Fitting')"> Most commonly used in steel fittings, but some plastic and copper fittings will be threaded.
  • Uses pipe dope or Teflon tape on the threads when joining to prevent leaks and corrosion.
  • If the threads are on the interior, the fitting is female. If the threads are on the exterior, the fitting is male.
  • IPS means Iron Pipe Size, and also refers to threaded pipe.
  • MIP means Male Iron Pipe size. It refers to a male threading that will fit an IPS pipe.
  • FIP means Female Iron Pipe size. It refers to a female threading that will fit an IPS pipe.