Rings / Radially Assembled Retaining Rings / MRE


Product Image


Part Data

  • Housing or Shaft Shaft
  • Axial or Radial Radial
  • Shaft Diameter Ds 0.157 inches
  • Ds mm 4.00 mm
  • Groove Diameter Dg 2.950 - 3.000 mm
  • Groove Width W 0.70 - 0.85 mm
  • Groove Depth D 0.50 mm
  • Free Diameter Df 2.820 - 2.950 mm
  • Thickness T *** 0.54 - 0.66 mm
  • Outside Diameter G 0.60 mm
  • Clearance Dia. Installed In Groove L2 8.90 mm
  • Weight Per 1000 Pcs. 0.100 kg
  • Edge Margin Y Min. mm
  • Hardness ST 67.5 - 71.0 HR30N
  • Hardness SS 63.0 - 69.5 HR30N
  • Interchange Waldes Truarc
  • Interchange IRR
  • Interchange Anderton
  • Interchange Mil Or Aero
  • Interchange Din

Performance Data

  • Thrust Load Ring Safety Factor Of 3 Pr 0.60 kN
  • Thrust Load Groove Safety Factor Of 2 Pg 0.18 kN
  • R.P.M. Limits Standard Material RPM 50000


  • Carbon Steel (SAE 1060-1090)
  • Stainless Steel (PH15-7 Mo, PH17-7)
  • Beryllium Copper
  • Special Material Grades


For plated rings, add .002" (.05 mm) to the listed maximum thickness.

  • PA - Phosphate, Carbon Steel
  • PD - Phosphate and Oil, Carbon Steel
  • PAL - Phosphate with Sealer, Carbon Steel
  • HPD - Heavy Phosphate and Oil, Carbon Steel
  • ZD - Zinc Plating, Carbon Steel
  • ZF - Zinc Bright, Carbon Steel
  • ZDL - Zinc Dichromate with Sealer, Carbon Steel
  • HZDL - Heavy Zinc Dichromate with Sealer, Carbon Steel
  • Z3X - Trivalent Chromate over Zinc, Carbon Steel
  • ZFF - Zinc Flash, Carbon Steel
  • CF - Copper Flash, Carbon Steel



Radially Assembled, External Reinforced E, ANSI Metric. The MRE retaining ring is a reinforced version of the ME ring, which will accommodate higher thrust loadings and RPM. MRE rings function in the same size grooves as regular E rings, so that you can c

Custom solutions

Can’t find what you’re looking for in an existing product, need a modified version of one of our standard parts, or simply aren’t sure what part you need?

Submit your custom specifications

Need help? Contact our Engineering team


CAD Models are provided for informational purposes only and may not represent the final part you receive.  Manufacturer assumes no responsibility for any such inconsistencies , and disclaims any liability to any party for any loss, damage, or disruption which may arise therefrom. Always contact Manufacturer for final measurements when specified in your design.


More than Parts. A True Partnership.

Our passion is creating the best rings, springs, and clamps. Our mission is to make your work a success. We are here for you.