GT205014 GM6515 aka 3955286 is a  High-Performance 5/16-18 2BX LHSF PLUG HSS-E-PM (Left Hand Sprial Flute) ,Tin,/Cr C/C Coated, Right Hand Cut HSS-E Powdered Metal (PM)  Cut HSS-E Powdered Metal (PM)  Victory Spiral-Flute Tap for Blind Hole Right Hand Helix/ 1.13″ Flute, 2.72″OAL, .318″ Shank

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