OSG USA, Inc. TP491301500901 1-1/8-7-2B-4FL-HSSE-Steam Oxide-Modified Bottoming-Spiral Flute TapFull Description Thread Diameter Size (TDZ) 1-1/8" Thread Tolerance Class (TCTR) 2B Threads per Inch (TPI) 7 Tool Type High Performance Tap Thread Standard NC Chamfer 2.5P-3P Overall Length (OAL) 180 mm Coat