What Size Threads do Tap Handles and Faucets Have

Most U.S. tap handles and faucets use a standard 3/8"-16 thread, which fits nearly every faucet setup. Metric versions exist, but they’re rare. If you’re unsure, it’s easy to check — details below.

• How to Check the Tap Handle Thread Size:
  Bring your tap handle to a local hardware store and use a thread checker commonly found on the bolt and nut isle. Alternatively, test it with a 3/8"-16 bolt—if it threads in smoothly, it's a match

• How to Check the Faucet Threads:
  Use a 3/8"-16 nut and see if it threads onto the faucet post. If it does, you have standard U.S. faucet threads.