Adjustable wrenches Measuring tape Spirit level Figure 1. Base hinge assembly on screw pile 36 Ground screw 1500 mm (4 ft 11 in) (1 pc) 37 Lifting eyebolt DIN444 - A - M20×160‑D20 (1 pc) 38 Hex-head screw DIN933 M20×90 (1 pc). Tightening torque 250 Nm. 39 Washer DIN125 A21 (1 pc) 8 Hex nut DIN934 M20 (1 pc). Tightening torque 250 Nm. 41 Plain washer ISO7094 ST 24 100 HV (1 pc)