Features

  • All the information you need for screws, fast and convenient, diameter, length, threads per inch, hole size, even tap & drill sizes.
  • Inch Checkers: Quickly and easily identify unified and American threads. Checks wood, sheet metal, self-tapping screws, plus bolts, rivets and many cotter pin sizes, NC, NF, and NS threads.
  • Metric Checkers: Check metric and ISO threads on screws and bolts both fine and course threads.