... export experience and good service 3.quick delviery time 4. machine tap HSS taps:Material: alloy tool steel, HSS and HSS ... 5-40UNC-1-8UNC and no 5-44UNF-1-12UNFSuitable for cast-iron, carbon steel, alloy steel, stainless steel, non-ferrous ... -Co5%, HSS-M2, HSS-4341Form: Straight Flute Hss Straight flute machine tap