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Tech Specifications

SKU: ES-21-S02

Series: ES

Ring Type: External

Units: Metric

Ring Style: Spirolox (Spiral)

Shaft Diameter: 21.00 mm

Groove Yield: 6,550 N

Ring Shear: 23,510 N

Groove Diameter: 19.72 mm

Groove Width: 1.20 mm

Material: 302 Stainless Steel

Rating: Light Medium Duty

Number of Turns: 2

Ring Radial Wall: 1.65 mm

Ring Thickness: 1.07 mm

Free Inside Diameter: 19.57 mm


The ES Series metric retaining rings are Smalley's standard Spiral Retaining Rings produced to Metric Aerospace specifications. They fit grooves specifically designed for 2-turn spiral retaining rings and accommodate light to medium duty applications.