... following size:6 UNF Taps and Dies: 10-32,1/4"-28, 5/16"-24, 3/8"-24, 7/16"-20, 1/2"-2017 ... UNC Taps and Dies: 3mmx0.5, 4mmx0.7 ... following size:6 UNF Taps and Dies: 10-32,1/4"-28, 5/16"-24, 3/8"-24, 7/16"-20, 1/2"-2017 ... UNC Taps and Dies: 3mmx0.5, 4mmx0.7 ...