Threading inserts Unified External threading / 60° full profile Carbon steel / Alloy steel N O P Stainless steel N M Cast iron K Non-ferrous metals N Applicable Cermet Dimension (mm) Carbide thread Applicable toolholder UN, UNF Thread PVD - Profile Insert Description angle type PDX Pitch IC S D1 RE (°) PR1115 PR1215 PR1515 PR1535 TC60 TPI 16ER 12UN 12 0.27 1.5 N N IC 14UN 14 0.23 1.5 N N PNA 16UN 16 0.2 1.1 Full N N 9.525 3.68 4 60 D1 RE PDX S 18UN 18 0.18 1 profile N N 20UN 20 0.16 1 N N 24UN 24 0.13 0.8 N N 16ER 08UN-TF 8 0.43 1.75 N N N N 10UN-TF 10 0.34 1.5 N N N N 12UN-TF 12 0.27 1.5 N N N N 13UN-TF 13 0.25 1.5 IC N N N N PNA Full 14UN-TF 14 9.525 3.68 4 0.23 1.5 60 N N N N D1 profile RE PDX S 16UN-TF 16 0.2 1.1 N N N N 18UN-TF 18 0.18 1 N N N N 20UN-TF 20 0.15 1 N N N N 24UN-TF 24 0.12 0.8 N N N N J24, J25, J26 J 16ER 08UN-TQ 10UN-TQ 8 10 0.43 0.34 1.75 1.5 N N N N N N IC 12UN-TQ 12 0.27 1.5 N N N 13UN-TQ 13 0.25 1.5 N N N PNA Full D1 14UN-TQ 14 9.525 3.68 4 0.23 1.5 60 N N N profile 16UN-TQ 16 0.2 1.1 PDX S N N N RE Molded Chipbreaker 18UN-TQ 18 0.18 1 Threading N N N 20UN-TQ 20 0.15 1 N N N 24UN-TQ 24 0.12 0.8 N N N IC PNA Full 22ER 08UN 8 12.7 4.9 4.85 0.43 2.1 60 N N D1 RE PDX S profile Right-hand shown Applicable toolholders Applicable threads M : Metric R, Rc (PT) (BSPT) : Tapered Pipe Insert description Applicable toolholders UN : Unified W : Whitworth Applicable Thread KTNR..-16(JCT) / KTNSR..-16 UNF : Unified Fine Thread NPT : American National Tapered Pipe 16ER... S..-KTNL16 G (PF) : Parallel Pipe Tr : 30˚ Trapezoidal 22ER... KTNR..-22 Threading inserts are sold TC60 (Threading) are in 5 piece boxes sold in 10 piece boxes Recommended cutting conditions: J38 N : Standard item R : Right hand only L : Left hand only U : Check availability Number of passes and depth of cuts: J39 J10