Backup Rings

Commonly used with metric o-rings, these back-up rings are made of virgin PTFE unless suffix specifies otherwise.

PTFE Material | 65 MM Nominal Inner Diameter | 2.5 MM Cross Section | Backup Ring

Commonly used with metric o-rings, these back-up rings are made of virgin PTFE unless suffix specifies otherwise.

PTFE Material | 180 MM Nominal Inner Diameter | 5 MM Cross Section | Backup Ring

Commonly used with metric o-rings, these back-up rings are made of virgin PTFE unless suffix specifies otherwise.

PTFE Material | 50 MM Nominal Inner Diameter | 2.5 MM Cross Section | Backup Ring

Backup rings are used in sealing and are designed to limit o-ring clearance gaps. They are used in high-pressure sealing situations.

95A Durometer | Urethane Material | 75 MM Nominal Inner Diameter | 2.5 MM Cross Section | Backup Ring

Parbak® style backup ring with a curved cross-section.

This style of backup ring is contoured on one face to minimize distortion of the o-ring when under pressure. Parbak® style backup rings should be installed with the contoured face against the o-ring, but reversal does no harm.

90A Durometer | Buna-N Rubber Material | 2 3/16 in Nominal Inner Diameter | 3/32 in Cross Section | Backup Ring

Hytrel backup ring with a flat cross-section.

Molded of 55D Durometer Hytrel, these back-up rings provide excellent extrusion resistance and tolerance to fluids such as phosphate esters, hydraulic oil and water. Stretched for installation, they return quickly to their original size for easy installation.

55D Durometer | Hytrel Material | 1 5/8 in Nominal Inner Diameter | 3/32 in Cross Section | Backup Ring

Commonly used with metric o-rings, these back-up rings are made of virgin PTFE unless suffix specifies otherwise.

PTFE Material | 110 MM Nominal Inner Diameter | 5 MM Cross Section | Backup Ring

Hytrel backup ring with a flat cross-section.

Molded of 55D Durometer Hytrel, these back-up rings provide excellent extrusion resistance and tolerance to fluids such as phosphate esters, hydraulic oil and water. Stretched for installation, they return quickly to their original size for easy installation.

55D Durometer | Hytrel Material | 2 in Nominal Inner Diameter | 3/16 in Cross Section | Backup Ring

Split Teflon backup ring with a flat cross-section.

PTFE can withstand high temperatures and is compatible with nearly all fluids.

PTFE Material | 5/8 in Nominal Inner Diameter | 1/16 in Cross Section | Backup Ring

Solid Urethane backup ring with a flat cross-section.

95A Durometer | Urethane Material | 7 in Nominal Inner Diameter | 3/16 in Cross Section | Backup Ring