Rotor Clip E-25ST Mcd External E Retaining Ring 1/4 in

Product Description

The ROTOR CLIP E-25ST MCD is an external E style retaining ring designed for use on shafts with a 0.25-inch diameter and a groove diameter of 0.21 inches. Manufactured from SAE 1060-1090 stainless steel with a cadmium finish, this ring delivers corrosion resistance and consistent holding force in demanding environments. At 0.025 inches thick and featuring a 3-prong design, it seats securely in the shaft groove to retain components against axial displacement. Licensed techs and mechanical assemblers working on precision equipment, fluid handling assemblies, and HVAC or pump shafting will find this ring a reliable OEM-style fastener component.

This retaining ring is suited for light-duty to medium-duty shaft retention applications in residential and commercial mechanical assemblies. Typical installation scenarios include motor shafts, pump impeller retention, and small-diameter shaft assemblies found in HVAC equipment, plumbing components, and related trade hardware. Its cadmium plating provides added corrosion protection in moist or chemically active service environments. The ring meets military specification MS 16633-1025 and conforms to SAE 1060-1090 and ISO 13485:2015 standards, making it acceptable for use in regulated and specification-driven installation work.

Key Features

• E style external ring with 3-prong design for positive shaft retention
• Fits 0.25-inch shaft diameter with 0.21-inch groove diameter
• SAE 1060-1090 stainless steel construction, hardness 66.5-71 HR30N
• Cadmium finish for corrosion resistance in wet or chemical environments
• Meets military specification MS 16633-1025 and ISO 13485:2015
• Groove width of 0.029 inches and ring thickness of 0.025 inches for precise fitment

Compatibility

Designed as an OEM-style external retaining ring for 0.25-inch shafts with a 0.21-inch groove diameter. Conforms to SAE 1060-1090, UNS G10600-G10900, and ISO 13485:2015 standards. Meets military specification MS 16633-1025.

Installation Notes

Installation requires appropriate external retaining ring pliers sized for E style rings on small-diameter shafts. De-energize and lock out all equipment before servicing any shaft assembly. Confirm groove dimensions match ring specifications before installation to prevent ring walk or ejection under load. Cadmium-plated components should be handled with appropriate personal protective equipment per applicable safety guidelines.