backup ringsThe chart below gives the metric and inch dimensions for the most common AS568 sizes of backup rings.

NOTE: The “A” dimension, or Axial Height, applies only to the rubber contoured backup rings. PTFE backup rings are flat, so they do not have this contour.

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Backup Ring Size Chart

DASH # ID (en) ANCHO (en) THK (en) A (en) ID (mm) ANCHO (mm) THK (mm) A (mm)