MK4/XL nextruder nozzle adapter for 6.3mm 1/4'' Torque Adapter/Wrench

- for nextruder, Prusa recommends : “The specified torque value is 1.5 Nm (13.3 lb-in). The use of a torque wrench is recommended” - for nextruder nozzle retainer screw is 0.2--0.3 Nm ( source ):

- for E3D v6 block, Prusa recommends : “tighten the nozzle with a force of 2.5 Nm (Newton Meter” I use a cheap Wisretec BDA2-030 torque adapter, that has a 0.3 - 30 Nm range.

Also you can use the 1.5 Nm rotor from Prusa XL - Nextruder Torque model: