OSG USA, Inc. TP101138600 1-3/8-12 Dia-H4-6 FL-Bright HSS-Bottoming Hand TapFull Description Thread Diameter Size (TDZ) 1-3/8" Tool Type General Purpose Tap Threads per Inch (TPI) 12 Chamfer 1.5P-2P Thread Standard NF Coating Bright Overall Length (OAL) 6-1/16" Flute Type Straight Thread Cutting Part L