Jergens Bolster Plate Bushings give users the ability to make repairs quickly, easily, and right on the machine. Re-tap the bolster plate hole, insert the threaded bushing to match and use a locking type sealant to lock the bushing in place. The Bolster Plate Bushings can also be used as threaded bushings in cast iron machine bases where greater thread strength is necessary. Eliminates the problems of “pulled-out” cast iron threads, and reduces the need for bulky threaded cast iron sections.