GENERAL TECHNICAL INFORMATION THREADING TOOL HOLDERS DESIGNATION SYSTEM 5 TOOL LENGTH 6 INSERT SIZE inch L (mm) IC D– 2.5 06 5/32" F– 3.25 08 3/16" H– 4.0 08U 3/16" K– 5.0 11 1/4" L– 5.5 16 3/8" M– 6.0 22 1/2" P– 7.0 22U 1/2" R– 8.0 27 5/8" S– 10.0 27U 5/8" T– 12.0 U – 14.0 V – 16.0 7 OPTIONAL SPECIFICATIONS U – For U-type inserts B – Bore for coolant C – Carbide shank SP – Special O – Offset style A – API (oil) 1243