Threading inserts American national tapered pipe Internal threading / 60° full profile Carbon steel / Alloy steel N P Stainless steel N M Cast iron N K Non-ferrous metals N N Applicable Carbi- Cermet Dimension (mm) thread de Applicable toolholder Thread PVD NPT Profile - - Insert Description angle type PDX Pitch IC S D1 RE (°) PR1115 GW15 TC60 TPI RE PDX S 16IR 11.5NPT 11.5 0.06 1.5 N N N Full 14NPT 14 9.525 3.68 4 0.05 1.5 60 N N N J27 D1 PNA profile IC 18NPT 18 0.04 0.9 N N N 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 SINR..-16 UNF : Unified Fine Thread NPT : American National Tapered Pipe 16IR... CINR..-16 G (PF) : Parallel Pipe Tr : 30˚ Trapezoidal J Threading 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: J40 J17