Thread Pitch Gauge Set Included Threads per Inch 4 TPI 4 1/2 TPI 5 TPI 5 1/2 TPI 6 TPI 7 TPI 8 TPI 9 TPI 10 TPI 11 TPI 11 1/2 TPI 12 TPI 13 TPI 14 TPI 15 TPI 16 TPI 18 TPI 20 TPI 22 TPI 24 TPI 26 TPI 27 TPI 28 TPI 30 TPI 32 TPI 34 TPI 36 TPI 38 TPI 40 TPI 42 TPI Maximum Thread Pitch - mm 42 Minimum Thread Pitch - mm 4 Number of Leaves 30 Thread Angle 60 Degrees Thread Type Unified Inch Gauge Material Steel Locking Device Yes