4-40 H2 F eft and piral lute-Right Hand ut LUG HSSE-PM GT605007 T60_ANSI_Plug_in_CAL T-TI T-Ti NSI Inch lug P HSSE-PM Taps .141mm .581 7.7 High-Performance Taps Victory eft-Hand Spiral-Flute HSSE-PM Taps Through Hole L eft Hand Helix/Flute