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Straight flute tap NO2, threading chamfer length 4-6xP, UN coarse thread UNC 1/2", 13 TPI, 2B tolerance class, measurements according to standard ISO 529, 9.0 mm shank, 7.1 mm square drive, HSS, bright, 1.5xD for deep blind or through hole threads, for carbon steel, unalloyed carbon steel, copper or alloyed copper