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12" x 3" x 12" PITCH x 11'-9" LG. RH HELICOID SCREW
12" DIA. x 12" PITCH x 11'-9" LG. RIGHT HAND HELICOID SCREW MOUNTED ON 3 1/2" STD. PIPE BUSHED & DRILLED BOTH ENDS FOR 3" DIA. 2-BOLT SHAFTS