9/16x18 UNF / NF Helical Thread Insert Tap 9/16-18

Product Code: ES-12467

9/16" UNF Helical Tap Use to produce threads for helical coil wire screw thread inserts only 1/2x20 • S.T.I. taps are oversized so the thread produced accepts a helical coil wire screw thread insert of the same nominal size and pitch • Taps are marked with the nominal size and pitch of the bolt to be used • Taps are marked with “S.T.I.”