1.Threading taps,machine tap,machine tools 2.Material:HSS,HSSE 3.Coating:bright,black,tin 4.Standard sizes HSS straight machine tap 1.Type:threading taps,machine tools,machine tap2.Material:HSS,HSSE3.Coating:bright,black,tin4.Standard:GB,JIS5.SGS ISO 9001:20086.Complete in specification HSS straight machine tap