The Bordo Chrome Tap Set UNF-1/2X20 (4234-1/2TS) is a reliable and durable toolset designed for creating precise UNF threads with a 1/2-inch diameter and 20 threads per inch. Whether you’re working on machinery, automotive projects, or any task that requires threaded connections with UNF fasteners in this specific size, this tap set is a valuable addition to your toolkit.

  • 1/2″” x 20 UNF Chrome Tap Set
  • Chrome Alloy UNF Hand Tap Set.
  • Used as thread chasers to clean an existing thread.
  • They can also be used to create a new female thread in non-ferrous metals and plastics.
  • Chrome alloy taps are not suitable for creating precision, safety or critical threads.
  • Unified National Fine thread form was introduced in 1948 as an attempt to standardise thread forms in the USA, Canada and the UK.
  • The thread profile of UNF is the same as for metric threads and is described in the JIS B0206 standard.
  • The thread is described by its major diameter and the number of threads per inch of length (TPI).


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