RS PRO, 27 Blades Thread Pitch Gauge, Imperial thread type
RS PRO, 27 Blades Thread Pitch Gauge, Imperial thread type, Sizes in Set: 4, 4-1/2, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 18, 19, 20, 22, 24, 25, 26, 28, 30, 32, 36, 40, 48, 60, Largest Imperial Measure: 60TPI, Largest Metric Measure: 60mm, Smallest Imperial Measure: 4TPI, Smallest Metric Measure: 4mm