Threading J1~J48 Summary of External Threading / Summary of Internal Threading J2 Product Introduction J4 Summary of Threading Inserts J5 Threading Inserts (External / Internal) J6~J15 Metric (M) J6 Unified (UN) J8 Parallel Pipe [G(PF)] Whitworth (W) J8 Tapered Pipe [R,Rc (PT) (BSPT)] J10 American National Tapered Pipe (NPT) J10 60° Type [Partial Profile / M, UN] J12 55° Type [Partial Profile / G(PF), R, Rc(PT) (BSPT), W] J14 30° Trapezoidal (Tr) J14 Threading Toolholders (External / Internal) J16~J31 KTN / KTNS J16 SIN / CIN J17 KTKF Small Tools J18 KTKF (Goose-neck Holder) Small Tools J18 KTTX Small Tools J20 S...KTTX Sleeve Holder J20 KTT J22 KITG J23 EZT EZ Bars J24 HPT 2-Edge Tip-Bars J28 VNT System Tip-Bars J30 PST-S (will be switched to EZT) Tip-Bars J30 S...STWP / S...STWP-E J31 Metric Unified Vc π×Dm×n Technical Information J32~J48 1,000 pered Pipe Parallel Pi Recommended Cutting Conditions J32 TF series Applicable Toolholders & Inserts J42 Ta pe Threading Methods J46 Whitworth Lead Angle & Relief Angle of Thread J47 Thread Types & Basic Profile J48 J1