Assembly Instructions for Parker EO-3 Metric Flareless Tube Fittings

Parker EO-3 Fitting System

Assembly of EO-3 tube fittings is complete when the marking on the indicator rings of the stud and nut align. Indicator rings save the last assembly position on the nut and the marking will indicate proper assembly. If the assembly of EO-3 tube and swivel connections is greater than required, the indicator ring is dragged along on the nut.

Re-assembly of EO-3 tube and swivel connections are made using the same instructions as initial installation - assembly is correct when the marking on the indicator rings align.


EO-3 Tube Connection Assembly Instructions

Image of EO3 Tube Connection Assembly - Step 1 Image of EO3 Tube Connection Assembly - Step 2 Image of EO3 Tube Connection Assembly Check - Correct Image of EO3 Tube Connection Assembly Check - Wrong
  • Tube must fit without tension
  • Screw nut until finger-tight
  • Do not twist indicator rings on the nut or stud prior to assembly
  • Tighten nut with wrench

 Assembly check:

  • Check if indication marks on the indication rings of stud and nut align

 If positioning of the indication ring marks do not align:

  • Further tightening is required until the marks of the indication rings of stud and nut align

EO-3 Swivel Nut Fittings Assembly Instructions

 If positioning of the indication ring marks do not align:

  • Further tightening is required until the marks of the indication rings of stud and nut align
Image of EO3 Swivel Nut Connection Assembly - Step 1 Image of EO3 Swivel Nut Connection Assembly - Step 2 Image of EO3 Swivel Nut Assembly Check - Correct Image of EO3 Swivel Nut Assembly Check - Wrong
  • Align EO-3 swivel fitting
  • Screw nut until finger-tight
  • Do not twist indicator rings on the nut or stud prior to assembly
  • Tighten nut with wrench

 Assembly check:

  • Check if indication marks on the indication rings of stud and nut align

 If positioning of the indication ring marks do not align:

  • Further tightening is required until the marks of the indication rings of stud and nut align

EO-3 Metric Straight Port Connection Assembly Instructions

Image of EO3 Metric Straight Port Connection Assembly - Step 1 Image of EO3 Metric Straight Port Connection Assembly - Step 2  
  • Screw in until hand tight


  • Tighten according to chart below
  • Metric Thread DIN ISO 6149-2/3
  • Metric Thread ISO 9974-2/3
  • BSPP Thread G DIN EN ISO 1179-2

Assembly Torques for EO-3 Fittings in Steel Ports

Tube O.D. Male Stud End Metric Assembly Torque [Nm] Male Stud End BSPP Assembly Torque [Nm]
6 M 10x1 18 G 1/8 A 18
8 M 12x1.5 25 G 1/4 A 35
10 M 14x1.5 45 G 1/4 A 35
12 M 16x1.5 55 G 3/8 A 70
15 M 18x1.5 70 G 1/2 A 90
16 M 22x1.5 120 G 1/2 A 90
18 M 22x1.5 120 G 1/2 A 90
20 M 27x2 180 G 3/4 A 180
22 M 27x2 180 G 3/4 A 180
25 M 33x2 310 G 1 A 310
28 M 33x2 310 G 1 A 310
30 M 42x2 450 G 1 1/4 A 450
35 M 42x2 450 G 1 1/4 A 450
38 M 48x2 540 G 1 1/2 A 540
42 M 48x2 540 G 1 1/2 A 540

Assembly Torques for EO-3 Fittings in Ports Made of Material Other Than Steel

Assembly in ports made of materials that strongly differ in strength and friction from steel generally require modified torques. When the turning angle from fingertight to the recommended torque is more than 30°, a reduction of torque is required. See the chart below for recommended torque reductions:

Port Material Hardness Torque Reduction
Steel with use of high performance lubrication All 10%
Ductile cast iron (e.g. GGG 50) All 10%
Aluminum HB 150 15%
HB 125 20%
HB 100 30%
< HB 100 35%

 

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.
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IMPORTANT!
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 www.P65Warnings.ca.gov