OSG USA, Inc. TP101139100 1-1/2-12 Dia-H4-6 FL-Bright HSS-Plug Hand TapFull Description Thread Diameter Size (TDZ) 1-1/2" Tool Type General Purpose Tap Threads per Inch (TPI) 12 Chamfer 4P-4.5P Thread Standard NF Coating Bright Overall Length (OAL) 6-3/8" Flute Type Straight Thread Cutting Part Length