Our 608 Bearing to NEMA 17 adapter is essentially a standard 608 skate bearing pillow block with a NEMA 17 motor mount pattern. This allows the other end of a long drive shaft to be supported using the same bracket work that is supporting the NEMA 17 motor. Each of the mounting bolt holes contains a captive hex nut geometry. You can use this to capture either a DIN934 compliant nut, a nylock nut,