Threading WF DN DCON Threading toolholders External toolholders S-KTN (External threading) 15 H LF 0° 20 H HDD Left-hand shown | Right-hand Insert for Left-hand Toolholder. Toolholder dimensions Spare parts Availa-bility Dimension (mm) Clamp screw Wrench (Torx) Description Applicable inserts L DCON H DN HDD LF WF J S16F- KTNL16 N 16 15 15 85 S19K- KTNL16 N 19.05 17 18 27 6 S20K- KTNL16 N 20 18 19 120 SB-3.5TR LTW-15S 16ER... S22K- KTNL16 N 22 20 21 S25.0H- KTNL16 N 25 100 23 24 32 10 S25K- KTNL16 N 25.4 120 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 - J44 J26