THREADING TABLE OF CONTENTS Threading Inserts..............................................................................................637 Selection Guide.................................................................................................638 Insert Identification System.................................................................................. 639 55° Partial Profile................................................................................................. 640 60° Partial Profile................................................................................................. 644 ISO Metric Full Profile.......................................................................................... 653 American UN Full Profile...................................................................................... 660 Whitworth Full Profile........................................................................................... 666 NPT/NPTF Full Profile.......................................................................................... 669 BSPT................................................................................................................... 673 STUB ACME....................................................................................................... 675 ACME.................................................................................................................. 677 UNJ..................................................................................................................... 680 MJ ISO 5855....................................................................................................... 683 Trapeze DIN 103.................................................................................................. 684 SAGE DIN 513.................................................................................................... 686 American Buttress............................................................................................... 687 API Oil Threads .................................................................................................. 688 Round DIN 405................................................................................................... 694 Threading Tools.................................................................................................697 Toolholder Identification System ..........................................................................698 External Holders...................................................................................................700 Threading Bars.....................................................................................................703 User Guide.........................................................................................................711 Cutting Speed Recommendations .......................................................................711 Threading Grades Chart......................................................................................712 636 ISCAR