Parker EO-3 Flareless Fitting Components | Use for Metric Tubing

Parker EO-3 Fitting System

EO-3 is an innovative Parker flareless fitting for metric tubing similar to the EO and EO-2 series. The EO3 flareless fitting system utilizes a visual indicator to prevent leakage due to inadequate or over-tightening, allowing the user more control to make high-quality, fast connections.

EO-3 metric tube fittings are constructed with a new mechanical tapered thread and tube design to eliminate blow-out equipment failures. The steel fittings feature a compact design, octagonal nut, integrated soft-sealing cone ring and elastomer seal for leak free connections. EO3 can also be connected to EO2 fittings using an adapter.

EO3 Tube Fittings Features:

  • Pressure Rating: Up to 6,000 psi for all tube sizes
  • Fitting Material: Steel with chromium 6 free plating
  • Tube Material: Conventional hydraulic steel, e.g. E235 (ST37) or E355 (ST52.4) standard to DIN EN 10305
  • Elastomer material: NBR
  • Temperature Resistance: -40° to 248°F (-40°C to 120°C)

EO-3 Flareless Tube Fittings Assembly Instructions

Available Configurations | Parker EO-3 FIttings Components

Parker EO3 M Nut



Parker EO3 GM Locknut



Parker EO3 ED Eolastic Soft Seal

Eolastic Soft Seal


OR EO-3 Connection O-Ring

EO-3 Connection O-Rings


Parker EO3 OR Male Stud End O-Ring

Male Stud End O-Rings


Parker EO3 OR Banjo O-Ring

Banjo Fitting O-Rings


Parker EO3 KDS Banjo FItting Soft Sealing Ring

Banjo Fitting Soft Sealing Rings





How to Order

  • Call Us: 888.715.4673
  • Email Us
  • Visit One of Our ParkerStores
  • Request a Visit - Only available in Our Geographical Area to our business customers. No retail customers please.
  • Click on the quote button below.



Hose and hose fittings series must be correctly matched. Using any fittings other than those specifically designated by the hose manufacturer for use with each specific hose can lead to hose assembly failure. Hose assembly failures have lead to damage, injury and death.

California Prop 65 Warning WARNING: These products can expose you to chemicals including lead and/or DEHP and/or carbon black, which are known to the State of California to cause cancer or birth defects or other reproductive harm.  For more information go to