Springlock Industries offers Steel Retaining Rings. Springlock Industries is an ISO9001:2000 certified company. It also offers taper washers, bolts, hex bolt, anchor bolt, studs, u-bolts, nuts, rivets, sheet metal components, split cotter pins, retaining rings/circlips, auto pin bobbin rings etc. Steel Retaining Rings are a piece of hardware that holds on to a shaft in order to locate other items on the shaft, or to locate the shaft to a fixed item. There are external retaining rings, which go on the outside of the shaft and internal retaining rings, which go on the inside of the shaft. Steel Retaining Rings are available in sizes from M-8 to M-150. The Steel Retaining Rings have a natural finishing.