The Apex D S 911 2 – 320 to 550 mm screw jack with double side flange has a centring hole in the diameter of 12 mm. The 320 mm to 520 mm screw jack with a double side flange has a more base area to compensate for the height. This screw jack with a double side flange can house high tensile SG iron. This screw jack has a spindle made from carbon steel trapezoidal thread. The structure and outer covering are made from what seems to be rubber.
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