Hydraulic torque wrench catalogues usually list N·m and ft·lb.

Standard hydraulic tools work at 700 bar (10,000 psi); bolt tensioners up to 1,500 bar.

Cylinder capacity is given in tonnes (1 t ≈ 9.81 kN). A US short ton is 907 kg.

Pump flow is usually given in L/min at the high-pressure stage.

For nut across-flats and stroke dimensions.

Hydraulic oil should generally stay below 60 °C in operation.