Rotor Clip DSH-4ST Pd B100 External Retaining Ring 4mm

Product Description

The ROTOR CLIP DSH-4ST PD B100 is a metric external retaining ring designed for 4 mm shaft diameters with a 3.8 mm groove diameter. Made from 1060-1090 spring steel and finished with a phosphate and oil coating, this ring seats into a precision-cut external groove to retain components on a shaft against axial movement. Ring thickness is 0.40 mm and groove width is 0.50 mm. It meets DIN 471 and SAE 1060-1090 fastener standards. Licensed tradespeople, machinists, and maintenance technicians install these rings in mechanical assemblies where reliable axial retention is required in compact, metric-dimensioned shafts.

This retaining ring is suited for light-duty mechanical assemblies, precision instruments, small motors, and industrial equipment using metric shafting. Its small form factor makes it a common choice in applications where space is tight and a secure, low-profile retention method is needed. The phosphate and oil finish provides a baseline level of corrosion resistance suitable for indoor and controlled-environment use. This SKU ships in a minimum order quantity of 100 pieces per order.

Key Features

• Fits 4 mm shaft diameter with 3.8 mm groove diameter for precise axial retention
• 1060-1090 spring steel construction with Rockwell hardness of 63-69.5 HR30N
• Phosphate and oil finish for corrosion resistance in controlled environments
• Meets DIN 471 and SAE 1060-1090 fastener standards
• Groove diameter tolerance of -0.04 to +0.04 mm for consistent fitment
• Metric system of measurement; nominal size 3.80 mm

Compatibility

Designed as an OEM-style external retaining ring for metric shafts conforming to DIN 471 groove geometry with a 4 mm shaft diameter.

Installation Notes

Installation requires the correct size external snap ring pliers to spread and seat the ring into the shaft groove without overstressing the ring. Power down and de-energize any equipment before servicing components on the shaft. Inspect the groove dimensions for compliance with DIN 471 tolerances before installation to ensure proper seating and retention force. Do not reuse retaining rings that have been removed, as repeated spreading can compromise their retention capacity.