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Queen Screw Jack Base Plate is made of steel, and is primarily used when setting scaffold up on even surfaces. This screw jack easily adjusts up & down to designed height.

Marine Bolts and Nuts: Mechanical parts, cylindrical, threaded fasteners with nuts. A class of fasteners consisting of two parts, head and screw (cylinder with outer thread), which must be fitted with nuts for fastening and connecting two parts with through holes. This form of connection is called bolted connection. If the nut is screwed down from the bolt, the two parts can be separated, so the bolt connection belongs to the detachable connectio

Queen Swivel Base Jack is made of steel, and is primarily used when setting scaffold up on even surfaces. This screw jack easily adjusts up & down to designed height.