NEW IRWIN 1904ZR 3/8-18 NPT TAPER CARBON STEEL PIPE HAND TAP WITH A MORSE MARXMAN 37/64 DRILL BIT WITH 1/2" SHANK MX1080049. TAP = 2-9/16" OVERALL LENGTH USE 37/64 DRILL BIT WHEN CUTTING NEW. WE HAVE A DEDICATED TEAM ON HAND AND ARE READY TO HELP!