Stainless Steel Retaining Rings

Internal vs external vs E-style retaining rings

Retaining rings are named for where they seat. External rings fit a groove around the outside of a shaft, internal rings fit a groove inside a bore or housing, and E-style rings snap onto a shaft groove from the side where axial space is tight. Choosing the right style comes down to whether you are retaining a part on a shaft or inside a bore, and how much room you have to install the ring. Stainless keeps the spring tension reliable over time.

Why choose stainless steel retaining rings

• Reliable retention: seats in a groove to lock parts against movement.
• Corrosion resistance: keeps spring tension in wet and outdoor use.
• Multiple styles: internal, external, and E-style for different grooves.
• Grade options: 18-8 for general use, 316 for salt and chloride exposure.

Common applications for stainless retaining rings

• Holding bearings and gears on shafts
• Retaining parts inside bores and housings
• Pulleys, rollers, and pivot assemblies
• Marine and outdoor machinery (use 316)

Stainless Steel Retaining Rings FAQ

What is the difference between an internal and external retaining ring?

An external ring seats in a groove around the outside of a shaft. An internal ring seats in a groove inside a bore or housing. The two are not interchangeable.

Do retaining rings need special pliers?

Yes. Retaining ring pliers expand or compress the ring to fit it into its groove without overstressing or deforming it.

What is an E-style retaining ring?

An E-ring snaps onto a shaft groove from the side rather than over the end, which is useful where axial clearance is limited.