Acme Nu-Trix thread restores table 27 special machine schedule a special fractional, tab 26 special short series, (303), table 34 special pipe taps, table 33 special O/A leng, special metric tap table, special taps, treatments, tap drill size selection, STI tap drill size selection, standard tap dimensions, metric tap drill size selection, pipe tap dimensions & thread, tap nomenclature, table 327 & 329, thread limits, tale 301B, tapping speed guide, straight pipe tap tables, table of thread limits, tap recommendation for class.