Parker EM163-80 O-rings

Meeting system sealing challenges

A new EM163-80 80 durometer black EPDM compound from Parker OES is a terpolymer of ethylene and propylene with a diene third monomer used for cross-linking. This is particularly useful for sealing phosphate ester hydraulic fluids and in glycol-based fluid brake systems in aircraft system applications.

Temperature range: -80 to 250°F (-62 to 121°C). Certifications include: NAS 1613 Rev 6. Color: black.


• Chemical resistance
• Hot water and steam up to 300°F (149°C)
• Glycol-based brake fluids (Dot 3 & 4) and silicone-based brake fluids (Dot 5) up to 300°F (149°C)
• Many organic and inorganic acids
• Cleaning agents, sodium and potassium alkalis
• Phosphate ester based hydraulic fluids (HFD-R, Skydrol, Hyjet)
• Silicone oil and grease
• Many polar solvents (alcohols, ketones, esters)
• Ozone, aging and weather resistant

Not compatible with mineral oil products.

Parker's ethylene propylene rubber (EPM, EPR, EPDM) O-rings are compatible with phosphate ester hydraulic fluids, amines, solvents and other chemicals.

Inside Diameter: 0.029 to 25.94; Width: 0.04 to 0.275

Nominal Hardness Range: >70; Nominal Hardness - 80

Thermal Application: Low temperature (<-30°F); Minimum Working Temperature (-80°F); Maximum Working Temperature (- 250°F)

Fluid Compatibility: Water/steam

Meets Certifications: NAS 1613 REV6   

Download Spec Sheet - EM163-80 OES 7002.pdf

*New EM163-80 replaces Parker E1267-80 compounds.