Carmex Internal Right Hand Whitworth 55° Thread Turning Insert 16mm / 11 TPI / 16 IR 11 W BMA Carmex External Right Hand ISO Metric Thread Turning Insert 0.4mm / 16 ER 0.4 ISO BMA Part Number: 4621-90

Part Number: 4621-90

Wide Size Range: Accommodates large size diameters from 500mm to 1000mm

resulting in a clean

vibration resistance

Carmex Internal Right Hand Whitworth 55° Thread Turning Insert 16mm / 11 TPI / 16 IR 11 W BMA Carmex External Right Hand ISO Metric Thread Turning Insert 0.4mm / 16 ER 0.4 ISO BMA Part Number: 4621-90Thread Turning Insert Whitworth 55, 11 TPI, External (Right Hand, Full Form) The Carmex 16 ER 11 W is a precision external thread turning insert for machining Whitworth (W) 55 full form threads at 11 TPI. Engineered for right hand threading on CNC and conventional lathes, it provides stable cutting action, reliable chip control, and accurate thread geometry with an excellent surface finish across steels, stainless steels, and non ferrous alloys.