Electro Hardware E-25ST PA-50 E Style Retaining Ring

Product Description

The ELECTRO HARDWARE E-25ST PA-50 is an external E style retaining ring designed to secure components on shafts in mechanical assemblies. Manufactured from plain-finish spring steel, this ring seats into a precision groove on the shaft to prevent axial movement of gears, bearings, pulleys, and similar components. The shaft diameter is 0.25 inches, the groove diameter is 0.21 inches, and the ring thickness is 0.025 inches. Maintenance technicians, millwrights, and industrial mechanics use these rings in a wide range of light- to medium-duty equipment applications.

E style retaining rings are well suited for assemblies where access is limited or where a standard circlip is not practical. The E style design allows installation and removal using standard snap ring pliers or a flat-blade tool without requiring shaft disassembly. These rings are commonly used in HVAC equipment, motors, pumps, conveyor systems, and general industrial machinery where compact shaft retention is needed. The plain steel finish is appropriate for dry or lightly lubricated environments.

Key Features

• E style external design for shaft groove retention without full disassembly
• Spring steel construction provides reliable radial grip and repeat installation durability
• 0.25 inch shaft diameter with 0.21 inch groove diameter for precise fitment
• 0.025 inch ring thickness for use in tight axial-clearance applications
• Plain finish suitable for dry and lightly lubricated service conditions

Compatibility

Designed as an OEM-style replacement or service part for mechanical assemblies requiring an external E style retaining ring on a 0.25 inch shaft with a 0.21 inch groove diameter.

Installation Notes

Installation and removal should be performed by a qualified mechanic or maintenance technician. Power down and de-energize all equipment before servicing any rotating assembly. Use appropriate snap ring pliers or a flat-blade tool sized for the ring to avoid deforming the spring steel during installation. Inspect the shaft groove for wear or damage before seating the ring to ensure proper retention.