M6 x 1 D5 3 Flute Plug SuperTuf Ni Spiral Point Tap with TiAlN, Regal Cutting Tools, Mfr#: 075733MS$32.39+
5/16"-18 NC H3 3 Flute Plug SuperTuf Ti Spiral Point Tap with TiCN, Regal Cutting Tools, Mfr#: 074607MS$29.69+
1/4"-28 NF H3 3 Flute Plug SuperTuf DM Spiral Point Tap with TiAlN, Regal Cutting Tools, Mfr#: 072306MS$24.25+
M4 x 0.7 D4 3 Flute Plug SuperTuf SS-DA Spiral Point Tap with TiN, Regal Cutting Tools, Mfr#: 073531MS$20.75+