® Thread Turning Inserts Threading Tools for the Oil & Gas Industries API Round EXTERNAL INTERNAL Pitch L I.C. Taper Ordering Code Ordering Code X Y TPI in IPF Right Hand Right Hand 10 16 3/8 0.75 16 ER 10 API RD 16 IR 10 API RD 1.5 1.4 8 16 3/8 0.75 16 ER 8 API RD 16 IR 8 API RD 1.3 1.6 Order example: 16 ER 10 API RD BMA Multitooth Pitch L I.C. Number EXTERNAL Anvil INTERNAL Anvil X Y TPI in of Teeth Ordering Code Ordering Code 10 22 1/2 2 22 ER 10API RD 2M AE22M 22 IR 10API RD 2M AI22M 2.4 3.7 10 27 5/8 3 27 ER 10API RD 3M AE27M 27 IR 10API RD 3M AI27M 3.8 6.2 8 27 5/8 2 27 ER 8API RD 2M AE27M 27 IR 8API RD 2M AI27M 3.0 4.5 Order example: 27 IR 10 API RD 3M MXC For recommended number of passes see page A04-4 For carbide grade and cutting speed see page A04-2 and 3 A01-32