® Swiss-Line Threading - Partial Profile 60° External Thread Y X L Right Version Right hand cutting Insert K20 BLU mm TPI Ordering Code X Y P Size L  M   0.5-1.5 48-16 GT19 R A60 2.8 1.1 K   19 1.75-3.0 14-8 GT19 R G60 2.8 1.7 N  0.5-3.0 48-8 GT19 R AG60 2.8 1.7 S   For L.H, specify GT19 L instead of GT19 R H ≤45 HRc Threading - Partial Profile 55° External Thread X Y L Right Version Right hand cutting Insert K20 BLU mm TPI Ordering Code X Y P Size L  M   0.5-1.5 48-16 GT19 R A55 2.8 1.0 K   19 1.75-3.0 14-8 GT19 R G55 2.8 1.7 N  0.5-3.0 48-8 GT19 R AG55 2.8 1.7 S   For L.H, specify GT19 L instead of GT19 R H ≤45 HRc First choice Alternative A08-25