Carmex Internal Right Hand NPT Thread Turning Insert 22 mm 22 IR N55 BMA Insize Imperial Long Stroke Dial Indicator Range 0 3" Series 2326 3 Why Choose Somta Series 208 Carmex External Right Hand ISO Thread Turning Insert 16mm 1.25 TPI 16 ER 1.25 ISO BMA Why Choose Somta Series 208 – HSS Co5 MT2 Drill 17mm Precision Ground Flutes – Promotes efficient chip removal and smooth cutting —a world leading manufacturer of high performance threading and grooving solutions—this insert forms part of an extensive product line including Thread Turning Inserts Applications: Internal thread turning for coarse pitch Whitworth 55° threads (BSW BSF) on steels and alloys