| | Grooveless Retaining Rings for Ungrooved Shafts Stock Drive Products/Sterling Instrument- SDP/SI, New Hyde Park, NY 28 Apr 2006 A new series of 11 grooveless external retaining rings from Sterling Instrument (an ISO 9001 manufacturer) are designed for use on ungrooved shafts, bosses, tubes and studs. Identified as the S73NW2 Series, they exert a frictional hold against axial displacement from either direction. | |